Answer:

Step-by-step explanation:
Divide both sides by 4x
A proportion is an equal ratio (or fraction)
18 divided by 18 is 1
72 divided by 18 is 4
so a proportion of 18:72 is 1:4
Answer:
B would be my best answer, not sure tho
A, because parallelogram is the same as a rectangle, just tilted a bit. therefore the method is just base X height.