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Finding the Fourth Proportional to 22,189.62, 30,619.16 and 12,761.22

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Solution

The fourth proportional to 22,189.62, 30,619.16 and 12,761.22 is: 17,609.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,189.62 : 30,619.16 = 12,761.22 : x
  2. Step 2: Convert to fraction form
    22,189.62/30,619.16 = 12,761.22/x
  3. Step 3: Cross multiply
    22,189.62x = 30,619.16 × 12,761.22
  4. Step 4: Simplify right side
    22,189.62x = 390,737,836.98
  5. Step 5: Solve for x
    x = 390,737,836.98/22,189.62
  6. Step 6: Final answer
    x = 17,609.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.