Question

Marta is making a scale drawing of her bedroom. Her rectangular room is 12.5 feet wide and 15 feet long. On the scale drawing, the width of her room is 5 inches. What is the length on her drawing?

Answer 1

use ratio and proportion here. since you're looking for length let that equal x

12.5 : 15 = 5 : x
\[\frac{12.5}{15} = \frac{5}{x}\]
\[12.5 x = 5 \times 15\]
\[x = \frac{5 \times 15}{12.5}\]