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Finding the Fourth Proportional to 18,001.62, 26,987.85 and 8,135.82

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Solution

The fourth proportional to 18,001.62, 26,987.85 and 8,135.82 is: 12,197.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,001.62 : 26,987.85 = 8,135.82 : x
  2. Step 2: Convert to fraction form
    18,001.62/26,987.85 = 8,135.82/x
  3. Step 3: Cross multiply
    18,001.62x = 26,987.85 × 8,135.82
  4. Step 4: Simplify right side
    18,001.62x = 219,568,289.79
  5. Step 5: Solve for x
    x = 219,568,289.79/18,001.62
  6. Step 6: Final answer
    x = 12,197.14

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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.