Home / 20,892.13-28,829.12-11,937.78

Finding the Fourth Proportional to 20,892.13, 28,829.12 and 11,937.78

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Solution

The fourth proportional to 20,892.13, 28,829.12 and 11,937.78 is: 16,472.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.13 : 28,829.12 = 11,937.78 : x
  2. Step 2: Convert to fraction form
    20,892.13/28,829.12 = 11,937.78/x
  3. Step 3: Cross multiply
    20,892.13x = 28,829.12 × 11,937.78
  4. Step 4: Simplify right side
    20,892.13x = 344,155,632.46
  5. Step 5: Solve for x
    x = 344,155,632.46/20,892.13
  6. Step 6: Final answer
    x = 16,472.98

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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.