How far would the student travel in 39 days?

Question

a student traveled 178 km in 13 days. at the same ratio, how far would the student travel in 39 days?

Answer 1

d represents the distance traveled

178 : 13 :: d : 39   proportion

13d = (178)(39)

 

Can you solve for d?

 

Or using reasoning

39 days is 3 times 13 days, so the distance is 3 times 178