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Finding the Fourth Proportional to 18,138.33, 27,221.13 and 13,469.22

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Solution

The fourth proportional to 18,138.33, 27,221.13 and 13,469.22 is: 20,213.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.33 : 27,221.13 = 13,469.22 : x
  2. Step 2: Convert to fraction form
    18,138.33/27,221.13 = 13,469.22/x
  3. Step 3: Cross multiply
    18,138.33x = 27,221.13 × 13,469.22
  4. Step 4: Simplify right side
    18,138.33x = 366,647,388.62
  5. Step 5: Solve for x
    x = 366,647,388.62/18,138.33
  6. Step 6: Final answer
    x = 20,213.96

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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.