In a cleaning mixture, the amount of water is directly proportional to the amount of ammonia. A mix with 5 gallons of water requires 10 teaspoons of ammonia. How many gallons of water are needed for 25 teaspoons of ammonia? Write your answer in decimal form.

Answer 1

According to the given proportion, 5 gallons of water correspond to 10 teaspoons of ammonia.

Let x be the number of gallons of water needed for 25 teaspoons of ammonia.

Using the proportionality:

5/10 = x/25

Solving for x:

10x = 125
x = 125/10
x = 12.5

Therefore, 12.5 gallons of water are needed for 25 teaspoons of ammonia.