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Finding the Fourth Proportional to 18,068.72, 27,103.11 and 11,867.90

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Solution

The fourth proportional to 18,068.72, 27,103.11 and 11,867.90 is: 17,801.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,068.72 : 27,103.11 = 11,867.90 : x
  2. Step 2: Convert to fraction form
    18,068.72/27,103.11 = 11,867.90/x
  3. Step 3: Cross multiply
    18,068.72x = 27,103.11 × 11,867.90
  4. Step 4: Simplify right side
    18,068.72x = 321,656,999.17
  5. Step 5: Solve for x
    x = 321,656,999.17/18,068.72
  6. Step 6: Final answer
    x = 17,801.87

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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.