Set up a proportion and solve. you are riding your bicycle. it takes you 28 min to go 8 mi. if you continue traveling at the same rate, how long will it take you to go 15 mi? set up a proportion and solve. a canary’s heart beats 130 times in 12 s. use a proportion to find how many times its heart beats in 50 s. set up a proportion and solve. your car averages 18 mi per gal on the highway. if gas costs $3.45 per gal, how much does it cost in dollars per mi to drive your car on the highway?