Darren is building a model of a submarine. If the scale is 1/2 inches to 1 foot, what length on the model represents 19 1/2 feet?

Answer 1

You can set this up as a proportion, setting the scale ratio equal to the actual ratio. The scale ratio is .5 in / 1 ft. The actual ratio is x in / 19.5 ft, where x represents the actual length of the model (in inches). For a proportion, we set the ratios equal to each other, giving .5 in / 1 ft = x in / 19.5 ft. The units cancel to give .5 / 1 = x / 19.5. Now just solve for x.

Answer 2

0.5 in/ 1 feet = x in / 19.5 Feet

to solve for x, re arrange the equation. (19.5 ft)x(0.5 in/1 ft)=x in, simplify, 19.5x0.5=? your answer