Question

A proportion and solve for the missing value.

8. A Katie's bake shop is having a sale to get rid of inventory to make room for new items. They're
selling 4 cupcakes for $9.49. How much would it cost if you bought 32 cupcakes?

Answer 1

Answer: $75.92

Explanation

First, set up a proportion:

`(4)/(9.49)` =
`(32)/(x)`

Next, use cross multiplication:

4x = 9.49 · 32

4x = 303.68

Now, solve like a normal equation:

4x/4 = 303.68/4

x = 75.92

Check your answer:

4/9.49 = 32/75.92

400/949 = 400/949

Now we know that it would cost $75.92 to buy 32 cupcakes at Katie's bake shop.