Home / 20,517.28-28,311.68-11,564.56

Finding the Fourth Proportional to 20,517.28, 28,311.68 and 11,564.56

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Solution

The fourth proportional to 20,517.28, 28,311.68 and 11,564.56 is: 15,957.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.28 : 28,311.68 = 11,564.56 : x
  2. Step 2: Convert to fraction form
    20,517.28/28,311.68 = 11,564.56/x
  3. Step 3: Cross multiply
    20,517.28x = 28,311.68 × 11,564.56
  4. Step 4: Simplify right side
    20,517.28x = 327,412,122.06
  5. Step 5: Solve for x
    x = 327,412,122.06/20,517.28
  6. Step 6: Final answer
    x = 15,957.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.