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Finding the Fourth Proportional to 8,387,629.20, 12,563,729.10 and 8,387,629.20

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Solution

The fourth proportional to 8,387,629.20, 12,563,729.10 and 8,387,629.20 is: 12,563,729.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387,629.20 : 12,563,729.10 = 8,387,629.20 : x
  2. Step 2: Convert to fraction form
    8,387,629.20/12,563,729.10 = 8,387,629.20/x
  3. Step 3: Cross multiply
    8,387,629.20x = 12,563,729.10 × 8,387,629.20
  4. Step 4: Simplify right side
    8,387,629.20x = 105,379,901,060,049.72
  5. Step 5: Solve for x
    x = 105,379,901,060,049.72/8,387,629.20
  6. Step 6: Final answer
    x = 12,563,729.10

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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.