The ratio of walkers to riders was 5 to 3. If 315 were walkers, how many were riders?
We have an equation: 315/? = 5/3
Cross multiply:
5? = 3153
⇒ ? = 315*3/5 = 189
There were 189 riders~
Set up a proportion, then solve.
5/3 = 315/x
Cross multiply
5x = 5x
3315 = 945
5x = 945
5x/5 = 945/5
x= 945/5
x= 189
Final answer: The riders are 189