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Finding the Fourth Proportional to 18,238.86, 27,358.28 and 4,387.86

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Solution

The fourth proportional to 18,238.86, 27,358.28 and 4,387.86 is: 6,581.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,238.86 : 27,358.28 = 4,387.86 : x
  2. Step 2: Convert to fraction form
    18,238.86/27,358.28 = 4,387.86/x
  3. Step 3: Cross multiply
    18,238.86x = 27,358.28 × 4,387.86
  4. Step 4: Simplify right side
    18,238.86x = 120,044,302.48
  5. Step 5: Solve for x
    x = 120,044,302.48/18,238.86
  6. Step 6: Final answer
    x = 6,581.79

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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.