On the blueprints of their new home, Paul and gertha notice the balcony is 9 inches long and 4 inches wide they know that the actual balcony will be 15.3 ft long. How wide will the balcony be?
We can solve this with a proportion
width on blueprint / length on blueprint = x / actual length
4/9 = x / 15.3 cross-multiply
15.3 *4 = 9x simplify
61.2 = 9x divide both sides by 9
6.8 in = the width