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Finding the Fourth Proportional to 18,126, 27,192.90 and 5,645.76

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Solution

The fourth proportional to 18,126, 27,192.90 and 5,645.76 is: 8,469.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,126 : 27,192.90 = 5,645.76 : x
  2. Step 2: Convert to fraction form
    18,126/27,192.90 = 5,645.76/x
  3. Step 3: Cross multiply
    18,126x = 27,192.90 × 5,645.76
  4. Step 4: Simplify right side
    18,126x = 153,524,587.10
  5. Step 5: Solve for x
    x = 153,524,587.10/18,126
  6. Step 6: Final answer
    x = 8,469.85

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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.