Art of Problem Solving: Joint Proportion

Art of Problem Solving's Richard Rusczyk introduces joint proportion.

[ArtofProblemSolving]

Distance = rate*time is indeed an example of joint proportion!

[CubicParadox]

I wish you were my school math teacher! Mines was soo boring and you're so fun:) It's a piece of cake to focus 🥞

[saveerjain]

“you wanna hear my dulcet tones spinning some math” 🤣

[pineapplemonkey]

I don't understand why 'road = k (time)(workers)'. Shouldn't k, the ratio, be different for  time and workers? I have the book 'the Art of Problem Solving Volume1 : the Basics' and I watched this video to help me on Example 4-4, if you can help me and give another explanation that would be great. Thanks!

[abhichakladar]

I don't understand what he did with the proportional ratios at the beginning.

[SpiderWick]

So, it's basically a speed = rate * time problem...

[acctsslppress]

if 20 machines makes 589 fans in 7 days then how many fans  17 machines will make in 11 days?please answer

[RatmanEpic]

Ima leave this comment here and see how far I’ve come in 5 years