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Finding the Fourth Proportional to 22,138.52, 33,213.65 and 12,761.65

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Solution

The fourth proportional to 22,138.52, 33,213.65 and 12,761.65 is: 19,145.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,138.52 : 33,213.65 = 12,761.65 : x
  2. Step 2: Convert to fraction form
    22,138.52/33,213.65 = 12,761.65/x
  3. Step 3: Cross multiply
    22,138.52x = 33,213.65 × 12,761.65
  4. Step 4: Simplify right side
    22,138.52x = 423,860,954.23
  5. Step 5: Solve for x
    x = 423,860,954.23/22,138.52
  6. Step 6: Final answer
    x = 19,145.86

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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.