Question

a scale on a map is 3cm: 24 miles. the distance between two cities is 6 cm. the actual distance between the two cities?

Explanation:

Step1: Set up proportion

Let $x$ be the actual distance. The proportion is $\frac{3}{24}=\frac{6}{x}$.

Step2: Cross - multiply

$3x = 24\times6$.

Step3: Solve for $x$

$3x=144$, so $x=\frac{144}{3}=48$ miles.

Answer:

48 miles