A store sells 4 reams of paper for $23.56. Which proportion can be used to find the cost of 15 reams of paper?

Question

unknownunknown · Answer

So Sabra, do you know how you'd calculate the cost of 1 ream of paper?

mathstudent55 · Answer

All the given information can be arranged in a table as shown below.
x is used for the unknown cost.
|dw:1432184693947:dw|

mathstudent55 · Answer

Each column of the table can be written as a ratio:

$\dfrac{4}{$23.56} $ and $\dfrac{15}{x} $

A proportion is setting two ratios equal to each other:

$\dfrac{4}{$23.56} = \dfrac{15}{x} $