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Finding the Fourth Proportional to 8,691,359.60, 13,021,487.40 and 4,193,721.20

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Solution

The fourth proportional to 8,691,359.60, 13,021,487.40 and 4,193,721.20 is: 6,283,077.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691,359.60 : 13,021,487.40 = 4,193,721.20 : x
  2. Step 2: Convert to fraction form
    8,691,359.60/13,021,487.40 = 4,193,721.20/x
  3. Step 3: Cross multiply
    8,691,359.60x = 13,021,487.40 × 4,193,721.20
  4. Step 4: Simplify right side
    8,691,359.60x = 54,608,487,764,912.88
  5. Step 5: Solve for x
    x = 54,608,487,764,912.88/8,691,359.60
  6. Step 6: Final answer
    x = 6,283,077.71

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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.