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Finding the Fourth Proportional to 8,393,356.80, 12,571,372.80 and 6,493,939.20

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Solution

The fourth proportional to 8,393,356.80, 12,571,372.80 and 6,493,939.20 is: 9,726,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,393,356.80 : 12,571,372.80 = 6,493,939.20 : x
  2. Step 2: Convert to fraction form
    8,393,356.80/12,571,372.80 = 6,493,939.20/x
  3. Step 3: Cross multiply
    8,393,356.80x = 12,571,372.80 × 6,493,939.20
  4. Step 4: Simplify right side
    8,393,356.80x = 81,637,730,623,733.77
  5. Step 5: Solve for x
    x = 81,637,730,623,733.77/8,393,356.80
  6. Step 6: Final answer
    x = 9,726,469.70

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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.