Asked by ILTHSM_

Kerry's computer keyboard is 18 inches long and 6 inches wide. Tim's keyboard has the same length-to-width ratio as Kerry's. Tim's keyboard is 12 inches long. how wide is Tim's keyboard?
I can't figure out how to do this problem. the only thing that I figured out is that all of the numbers are divisible by 3. Can someone help please?
Answered by ILTHSM_
My answer choices are
A. 4 inches
B. 9 inches
C. 15 inches
D. 36 inches
Answered by Ms. Sue
18/6 = 12/x
Cross multiply and solve for x.

18x = 72
x = 4

The answers aren't divisible by 3. However, the width is 1/3 of the length.
Answered by Jay
to find the length to width ratio you divide the width by the length
Answered by Reiny
The sides of similar shapes are proportional to the their corresponding sides.

x/6 =12/18 = 2/3
x = 4

(notice that 12/18 = 4/6)
Answered by Jay
Wow, u do a lot better at explaining things, Ms. Sue.
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