Solving Proportion Problems

Question 1:

x and y are in direct proportion. When x = 1, y = 8, find y when
x = 8.

64

Question 2:

x and y are in direct proportion. When x = 10, y = 40, find y when
x = 8.

32

Question 3:

x and y are in direct proportion. When x = 1, y = 5, find y when
x = 10.

50

Question 4:

x and y are in direct proportion. When x = 11, y = 44, find y when
x = 4.

16