Question The ratio of Evan’s red toy cars to blue toy cars is 3:4. Evan has 12 red toy cars. How many blue toy cars does Evan have?
The ratio of Evan’s red toy cars to blue toy cars is 3:4.
This means that for every 3 red toy cars, Evan has 4 blue toy cars.
If Evan has 12 red toy cars, to find the number of blue toy cars he has, we can set up a proportion:
3/4 = 12/x
Cross-multiplying, we get 3x = 4 * 12
3x = 48
Dividing both sides by 3, we get x = 16
Therefore, Evan has 16 blue toy cars. Answer: \boxed{16}.