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Finding the Fourth Proportional to 20,811,945.30, 31,217,917.95 and 20,811,945.30

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Solution

The fourth proportional to 20,811,945.30, 31,217,917.95 and 20,811,945.30 is: 31,217,917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811,945.30 : 31,217,917.95 = 20,811,945.30 : x
  2. Step 2: Convert to fraction form
    20,811,945.30/31,217,917.95 = 20,811,945.30/x
  3. Step 3: Cross multiply
    20,811,945.30x = 31,217,917.95 × 20,811,945.30
  4. Step 4: Simplify right side
    20,811,945.30x = 649,705,600,755,288.12
  5. Step 5: Solve for x
    x = 649,705,600,755,288.12/20,811,945.30
  6. Step 6: Final answer
    x = 31,217,917.95

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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.