Consider the enlargement of the rectangle.

Question

A smaller rectangle with length of x inches and width of three-fifths inch. A larger rectangle with length of 20 inches and width of 12 inches.

Use the proportion to find the missing dimension of the original rectangle.

1. Set up the proportion: StartFraction x over three-fifths EndFraction = StartFraction 20 over 12 EndFraction
2. Use cross products: 12(x) = 20(3
5
)
3. Simplify:
12x =
4. Divide:
x =

Answer 1

Calculating the cross products:

12(x) = 20(3/5)
12x = 60
Dividing by 12:
x = 5

Therefore, the missing dimension of the original rectangle is 5 inches.