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Finding the Fourth Proportional to 12,385,687.80, 18,578,531.70 and 9,551,335.80

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Solution

The fourth proportional to 12,385,687.80, 18,578,531.70 and 9,551,335.80 is: 14,327,003.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385,687.80 : 18,578,531.70 = 9,551,335.80 : x
  2. Step 2: Convert to fraction form
    12,385,687.80/18,578,531.70 = 9,551,335.80/x
  3. Step 3: Cross multiply
    12,385,687.80x = 18,578,531.70 × 9,551,335.80
  4. Step 4: Simplify right side
    12,385,687.80x = 177,449,794,937,644.88
  5. Step 5: Solve for x
    x = 177,449,794,937,644.88/12,385,687.80
  6. Step 6: Final answer
    x = 14,327,003.70

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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.