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Finding the Fourth Proportional to 18,753,621.20, 28,109,436.60 and 10,670,469.20

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Solution

The fourth proportional to 18,753,621.20, 28,109,436.60 and 10,670,469.20 is: 15,993,757.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753,621.20 : 28,109,436.60 = 10,670,469.20 : x
  2. Step 2: Convert to fraction form
    18,753,621.20/28,109,436.60 = 10,670,469.20/x
  3. Step 3: Cross multiply
    18,753,621.20x = 28,109,436.60 × 10,670,469.20
  4. Step 4: Simplify right side
    18,753,621.20x = 299,940,877,469,652.69
  5. Step 5: Solve for x
    x = 299,940,877,469,652.69/18,753,621.20
  6. Step 6: Final answer
    x = 15,993,757.91

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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.