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Finding the Fourth Proportional to 18,944,057.20, 28,419,772.20 and 8,161,337.20

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Solution

The fourth proportional to 18,944,057.20, 28,419,772.20 and 8,161,337.20 is: 12,243,593.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,944,057.20 : 28,419,772.20 = 8,161,337.20 : x
  2. Step 2: Convert to fraction form
    18,944,057.20/28,419,772.20 = 8,161,337.20/x
  3. Step 3: Cross multiply
    18,944,057.20x = 28,419,772.20 × 8,161,337.20
  4. Step 4: Simplify right side
    18,944,057.20x = 231,943,344,071,385.84
  5. Step 5: Solve for x
    x = 231,943,344,071,385.84/18,944,057.20
  6. Step 6: Final answer
    x = 12,243,593.95

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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.