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Finding the Fourth Proportional to 13,882,541.40, 20,776,572.90 and 12,181,930.20

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Solution

The fourth proportional to 13,882,541.40, 20,776,572.90 and 12,181,930.20 is: 18,231,442.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,882,541.40 : 20,776,572.90 = 12,181,930.20 : x
  2. Step 2: Convert to fraction form
    13,882,541.40/20,776,572.90 = 12,181,930.20/x
  3. Step 3: Cross multiply
    13,882,541.40x = 20,776,572.90 × 12,181,930.20
  4. Step 4: Simplify right side
    13,882,541.40x = 253,098,760,863,011.53
  5. Step 5: Solve for x
    x = 253,098,760,863,011.53/13,882,541.40
  6. Step 6: Final answer
    x = 18,231,442.90

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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.