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Finding the Fourth Proportional to 18,361.27, 27,469.81 and 14,169.61

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Solution

The fourth proportional to 18,361.27, 27,469.81 and 14,169.61 is: 21,198.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,361.27 : 27,469.81 = 14,169.61 : x
  2. Step 2: Convert to fraction form
    18,361.27/27,469.81 = 14,169.61/x
  3. Step 3: Cross multiply
    18,361.27x = 27,469.81 × 14,169.61
  4. Step 4: Simplify right side
    18,361.27x = 389,236,494.47
  5. Step 5: Solve for x
    x = 389,236,494.47/18,361.27
  6. Step 6: Final answer
    x = 21,198.78

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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.