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Finding the Fourth Proportional to 18,474.60, 27,711.90 and 11,087.40

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Solution

The fourth proportional to 18,474.60, 27,711.90 and 11,087.40 is: 16,631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,474.60 : 27,711.90 = 11,087.40 : x
  2. Step 2: Convert to fraction form
    18,474.60/27,711.90 = 11,087.40/x
  3. Step 3: Cross multiply
    18,474.60x = 27,711.90 × 11,087.40
  4. Step 4: Simplify right side
    18,474.60x = 307,252,920.06
  5. Step 5: Solve for x
    x = 307,252,920.06/18,474.60
  6. Step 6: Final answer
    x = 16,631.10

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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.