Exam 18: Proportion

The weight of 4 feet of 1-inch copper tubing is 2.62 pounds. Find the weight of 25 feet of the tubing.

Solve the proportion for the unknown value ( x ): 3.5:1= x :14 .

A 10,000-Btu window air conditioner requires 12 ounces of R-134a refrigerant to completely recharge the system. How much R-134a would be needed to refill a proportionally larger 15,000-Btu window air conditioner?

In the proportion A:B = C:D, if A is an unknown quantity it can be found by using the equation: $A=\frac{B × C}{D}$ .

The weight of 10 gallons of #2 fuel oil is 71 pounds. What is the weight of 205 gallons?

Solve the proportion for the unknown value ( x ): 8:64 = 16: x.

Another application of proportions is when dealing with pulleys connected by a belt. In this application, the pulley speeds are in proportion to the pulley diameters

Solve the proportion for the unknown value ( x ): 5.4/18.9 = x /21.

Solve the proportion for the unknown value ( x ): 250/5 = 50/ x.

For each 4 feet of duct, the pressure in the duct drops 0.003 inch of water. What is the pressure drop between the ends of a duct that measures 26 feet?