Home / 21,972.80-32,882.40-20,129.60

Finding the Fourth Proportional to 21,972.80, 32,882.40 and 20,129.60

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Solution

The fourth proportional to 21,972.80, 32,882.40 and 20,129.60 is: 30,124.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.80 : 32,882.40 = 20,129.60 : x
  2. Step 2: Convert to fraction form
    21,972.80/32,882.40 = 20,129.60/x
  3. Step 3: Cross multiply
    21,972.80x = 32,882.40 × 20,129.60
  4. Step 4: Simplify right side
    21,972.80x = 661,909,559.04
  5. Step 5: Solve for x
    x = 661,909,559.04/21,972.80
  6. Step 6: Final answer
    x = 30,124.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.