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Finding the Fourth Proportional to 18,693,862.60, 28,040,793.90 and 10,631,705.80

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Solution

The fourth proportional to 18,693,862.60, 28,040,793.90 and 10,631,705.80 is: 15,947,558.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693,862.60 : 28,040,793.90 = 10,631,705.80 : x
  2. Step 2: Convert to fraction form
    18,693,862.60/28,040,793.90 = 10,631,705.80/x
  3. Step 3: Cross multiply
    18,693,862.60x = 28,040,793.90 × 10,631,705.80
  4. Step 4: Simplify right side
    18,693,862.60x = 298,121,471,143,234.62
  5. Step 5: Solve for x
    x = 298,121,471,143,234.62/18,693,862.60
  6. Step 6: Final answer
    x = 15,947,558.70

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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.