Setting up proportions to solve word problems | 7th grade | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now:
www.khanacadem...
Some examples of writing two ratios and setting them equal to each other to solve proportion word problems
Practice this lesson yourself on KhanAcademy.org right now:
www.khanacadem...
Watch the next lesson: www.khanacadem...
Missed the previous lesson?
www.khanacadem...
Grade 7th on Khan Academy: 7th grade takes much of what you learned in 6th grade to an entirely new level. In particular, you'll now learn to do everything with negative numbers (we're talking everything--adding, subtracting, multiplying, dividing, fractions, decimals... everything!). You'll also take your algebraic skills to new heights by tackling two-step equations. 7th grade is also when you start thinking about probability (which is super important for realizing that casinos and lotteries are really just ways of taking money away from people who don't know probability) and dig deeper into the world of data and statistics. Onward! (Content was selected for this grade level based on a typical curriculum in the United States.)
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy à ªs 7th grade channel:
/ channel
Subscribe to Khan Academy: www.youtube.co...

[@stephsavvy]

needed this refresher before the TEAS. so simple and made easy to understand!

[@bibinadia2068]

Thank you

[@jdpoohmac3106]

5:27 "lemme do that in that blue color"

[@sathikumari6970]

😂

[@nawh1]

Love the teacher's voice! So soothing for us suffering from math anxiety!

[@iccyy4181]

shut up

[@thevessel6679]

I can't believe that I HAD to watch this video on MY time outside of school

[@Vector_Ze]

I'm an old guy who hasn't been in a classroom in 35 years. Mathematically, I went through college Calculus level 1. But, it surely should go without saying, I've forgotten much through lack of use over the decades. A few years ago, I bought a "Calculus for Dummies" book. And the refresher was great! Instruction has changed a lot since I was in school. At each grade level it is clear that subjects being taught now are much more advanced than what I encountered at the same levels. And a lot of procedures are different too. For my own gratification, I started doing the course on the Kahn Academy web site 4-5 days ago, starting at 3rd grade level math and working up. I'm now at 7th grade. Proportions don't bother me, but word question have always seemed to unnecessarily complicate things. It's hard to fight the desire to just solve for the variable. The videos do a good job of filling in the void of not having an instructor to question when something is unclear. So, thanks.

[@mrusman_yt2137]

😢

[@domnatmusk5868]

I have the Starr test in 10 minutes and this helped me a lot 😄

[@nocturnalvisionmusic]

I hope you passed it 😁

[@edo17b]

Bad

[@save_potato643]

I'm ten years late, but at least my homework is done

[@alanadimarzo1562]

6 eggs

[@Qiqi11223]

thx but I still don"t know how Im supposed to figure out this problem: The distance a car travels is proportional to how many rotations its wheels make. A certain car travels 245 feet in 30 rotations of its wheels. How far will the car travel in 50 rotations? The d be equal to that distance. Set up and solve a proportion for the value of d. Round to the nearest tenth. I HAVE A QUIZ TOMORROW HELP

[@heniuniu9]

U should have used math with Mr.J bro he helps a lot in math stuff

[@sadiqanasar3764]

why to flip the values??

[@epicvideos6886]

this is Joshua Earle this video helps a lot

[@markloves0305]

Ty was always clueless of which way to write it...rlly helped ❤️

[@AEL231]

What were the answers? I want to make sure I was correct

[@cameronjones7339]

i got 8.94, 5.71 and 6

[@ghostrideralex11]

Big help thx!

[@spork3842]

but im so confued still. all of these are valid, so why does kahn on the quiz say I got it incorrect?

[@leighg100]

Khan, you have helped so many people to work through the beauty of math...thank you... I am an elementary and middle school principal.

[@zyliththeblob2544]

There is no beauty in math, only horror and pain

[@warriorintruder7213]

@@zyliththeblob2544 yes lol

[@smaransure2234]

@@zyliththeblob2544 that's true

[@ultimate9801]

​@@zyliththeblob2544nigga just say u cant understand the beauty of math lol🤣

[@mrman2841]

it is very clear for me you explain it very well

[@gigopapigi5040]

Thank u so much sal

[@maiziedigby710]

Do they have a video to solve them 😥😥

[@DanielG11802]

Its weird how these vids are helping me more then my math teacher

[@ratgutz982]

Ikr lol

[@heniuniu9]

Frrrrrrrrr same😂

[@talialichtstein]

your are a BEAUTIFUL person

[@alicechen1402]

lol

[@ryanneuwirt8424]

Did you have to put 7th grade in the title 😑

[@algonzalez1797]

hate how he dosnt finish the problem good explanation tho

[@astrotrainreviews1355]

This is very helpful, thanks!!!

[@Guest-ez7vk]

*6.12M* subs, and *697,225* views compared to *635* likes and *125* dislikes and *79* comments. Me: There are mostly just *bots* watching this.

[@Guest-ez7vk]

Also, I agree with you, it just that I'm trying to make a joke but now it's not hilarious

[@warriorintruder7213]

@@Guest-ez7vk hello after 1 year

[@elim.4818]

i was studying for my test it said the test was gonna be about solving word problems proportionally...i had no clue what to study for till i saw this video.

[@rawkstar3dg]

Helped

[@laurenjaytisbe1946]

i think I got more stupid watching this I wanted to know how to solve it not flip it im not that stupid I know how to flip numbers

[@Sundropicee]

Thank you You help meh with a quize I have trmorrow 🙂

[@MixMatched1]

This video is my savior. THANK YOU.

[@sardarbaig1]

This is the BEST it helps sooooo much THANKS :)

[@jenniferwhite6663]

helped me a lot

[@chermans1221]

Anyone find his mistake when he explains '8 apples'?

[@bridgetthigpen7146]

it does'nt matter!!

[@sea5205]

Taking way to long to explain a simple problem

[@ugghtjeffy1608]

This is tomorrows HomeWork LOL

[@a.nnyyaaaa188]

Why isn’t he actually solving the problem he’s just writing the equation that won’t help me on thursdays test

[@scooter_boy]

yeah its annoying

[@nel.9788]

it's setting up the proportion;; read the title lol

[@lw8638]

Wow. There's about six minutes of my life gone that I wish I could get back.

[@StuperStar]

Yup.

[@michaelbouchard6397]

same

[@thevessel6679]

Same, we we're never even told this and they expected us to know it

[@kimjohnson431]

You are a really great help. Thank you for teaching me how to do the math right.

[@lianaworks]

20 minutes of khan academy... thanks teacher

[@sazaurfi]

Thanks bro

[@Haku-md6hd]

I write my assignment wrong i put it on the wrong way

[@marissadennis7880]

I said with only one number but I guess it worked

[@nicholascomet8528]

Thank you for the help.

[@yaoiisnotexplicit4595]

So on number one, can you switch only one side and it can still be right?

[@cssndr09]

no

[@HealingNations8888]

This video was very helpful. Thanks so much!!!

[@theflyingllamas649]

Thank this really helped

[@jamelacollins6208]

You explain this very well

[@steventucker8178]

Simply divide to find out the individual cost and then X however many number you're trying to find out what is all this extra crap

[@AlexisWilliams123]

It’s cause it’s “setting up” proportions not solving them

[@jellyfam_sb2495]

Zhihe Fu it is

[@Unkown242]

You know things can get really complicated in higher levels if you don't do this "crap" you are talking about

[@marsancientruinsspotter9819]

Yes, I felt infuriated for the very same reason. Then I understood it is about "setting up proportions to solve a problem" and not about solving the problem. But you are definitely more intelligent, expressing your rebellion regarding an input you find needlessly complicated, than sheep-brained-people advising you to just accept it without questioning the teaching.

[@Unkown242]

@@marsancientruinsspotter9819 i agree that we should question things if we don't understand them. Yea don't just accept everything. I think i gave him a good enough reason why sometimes we Set it up before finding an answer

[@markand0]

hi

[@skxll_]

i don't understand it seems like you didn't even answer the questions

[@MatteoCarnevali-k1g]

You belong in a jail

[@cheesedogs6806]

Solve the shit bruh

[@xorpmh6069]

Cheesedogs at the beginning of the video, he clearly said that he wouldn't solve them and show how to present the questions using proportions if you were listening.

[@Charmonroe]

Then how can you solve 20/310 = ?/100.

[@litmodz4826]

Uhhhh my problem has 2 numbers and yours have 3 what do I do

[@RobLeeBea]

What’s the answer to the first question?

[@reigndigrazia1]

Helped much bastard

[@StuperStar]

Lul

[@Cyno7]

@zalwanich how are you?

[@vincentgonzales7772]

😎

[@phillipgonzalez5011]

So the answer to number one is $8.94?

[@warriorintruder7213]

Yos

[@frankyxd8762]

Found it helpfull thank you.

[@epicvideos6886]

not!

[@theeggoftheking4519]

he kept stuttering

[@allissoncruz7277]

There no problem with that lol it’s okay it didn’t effect you

[@MattRevs]

So whats the answer to the first one? You said to solve for x. Ok, well CAN YOU DO THAT PLEASE? All you really did was write it out differently and paid less attention to how you would actually solve the problem. You gave no answer.

[@markloves0305]

The title of video is writing proportions not solving proportions

[@biryaniboy]

why did you click on this video if you already knew the stuff....

[@MattRevs]

Rehman Khan I dont know the stuff. I came here to see how to do it, not how to write the question!

[@paulbarne1399]

+MattRevs You cross multiply

[@MattRevs]

paul barne Yes, but how do you do that? THAT is what I'm asking. This video is useless!!!

[@HarrySatchelWhatsThatSmell]

Enough with the colors. Just lay the problem out. jeez.

[@beabear8834]

Why don’t you solve them all the way through

[@binumukhiya8904]

Bab

[@jospinexelsior]

bad