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?

Question

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?

Answer 1

My answer choices are
A. 4 inches
B. 9 inches
C. 15 inches
D. 36 inches

Answer 2

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.

Answer 3

to find the length to width ratio you divide the width by the length

Answer 4

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)

Answer 5

Wow, u do a lot better at explaining things, Ms. Sue.