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Finding the Fourth Proportional to 18,138.38, 27,213.64 and 16,391.48

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Solution

The fourth proportional to 18,138.38, 27,213.64 and 16,391.48 is: 24,592.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.38 : 27,213.64 = 16,391.48 : x
  2. Step 2: Convert to fraction form
    18,138.38/27,213.64 = 16,391.48/x
  3. Step 3: Cross multiply
    18,138.38x = 27,213.64 × 16,391.48
  4. Step 4: Simplify right side
    18,138.38x = 446,071,658.74
  5. Step 5: Solve for x
    x = 446,071,658.74/18,138.38
  6. Step 6: Final answer
    x = 24,592.70

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1.5x scale

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.