Question

a model of a building is constructed using a scale of 1 inch : 4.5 feet. if the model is 12 inches tall, how tall is the actual building? ? feet

Explanation:

Step1: Set up proportion

Let $x$ be the height of the actual building. The proportion is $\frac{1}{4.5}=\frac{12}{x}$.

Step2: Cross - multiply

$1\times x = 4.5\times12$.

Step3: Calculate result

$x = 54$.

Answer:

54