Proportion

Question

14 gallons for d dollars. 8 gallons for $24.72

Can you please tell me what d means??

Answer 1

Cost of 8 gallons quantity is  $24.72.

Cost of 14 gallons quantity is  dollars.

Find the value of .

A proportion is an equation stating that two ratios are equal.

Thus, if the four variables and are in proportion then .

Here and .

From the definition of  proportion of ratios, .

When the two ratios are equal then cross product of the ratios are equal.

Find the value of  by cross multiplication.

.

Here  is the cost of 14 gallons quantity  43.26 dollars.