word problem (ratio)

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If the ratio of fast readers to slow reader is 9 to 5, and there are 4,716 fast readers, how many slow readers are there?

May 17th, 2015


These given values will be used in proportions to solve the problem:

fast_one = 9

slow_one = 5

fast_two = 4716

slow_two = ?

You can rewrite a ratio of 9 fast readers to 5 slow readers as a proportion: 9/5

Now, set this equal to the proportion of fast to slow readers using the new number of fast readers.

We will be solving for slow_two.



(9)*(slow_two) = (4716)*(5)


slow_two=2620 slow readers

Let me know if you have any questions!  Hope this helps :)

May 17th, 2015

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