Home / 20,534.20-28,337.04-11,102.80

Finding the Fourth Proportional to 20,534.20, 28,337.04 and 11,102.80

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Solution

The fourth proportional to 20,534.20, 28,337.04 and 11,102.80 is: 15,321.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,534.20 : 28,337.04 = 11,102.80 : x
  2. Step 2: Convert to fraction form
    20,534.20/28,337.04 = 11,102.80/x
  3. Step 3: Cross multiply
    20,534.20x = 28,337.04 × 11,102.80
  4. Step 4: Simplify right side
    20,534.20x = 314,620,487.71
  5. Step 5: Solve for x
    x = 314,620,487.71/20,534.20
  6. Step 6: Final answer
    x = 15,321.78

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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.