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Finding the Fourth Proportional to 18,529.30, 27,801 and 11,138.86

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Solution

The fourth proportional to 18,529.30, 27,801 and 11,138.86 is: 16,712.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,529.30 : 27,801 = 11,138.86 : x
  2. Step 2: Convert to fraction form
    18,529.30/27,801 = 11,138.86/x
  3. Step 3: Cross multiply
    18,529.30x = 27,801 × 11,138.86
  4. Step 4: Simplify right side
    18,529.30x = 309,671,446.86
  5. Step 5: Solve for x
    x = 309,671,446.86/18,529.30
  6. Step 6: Final answer
    x = 16,712.53

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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.