A piano tuner charges $63 for 1.5 hours of work. Which proportion can be used to find x, the number of dollars the piano tuner charges for 4 hours of work?

1 answer

The proportion that can be used to find x, the number of dollars the piano tuner charges for 4 hours of work, is:

\(\frac{1.5}{63} = \frac{4}{x}\)