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Finding the Fourth Proportional to 22,139.20, 33,110.88 and 19,691.20

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Solution

The fourth proportional to 22,139.20, 33,110.88 and 19,691.20 is: 29,449.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,139.20 : 33,110.88 = 19,691.20 : x
  2. Step 2: Convert to fraction form
    22,139.20/33,110.88 = 19,691.20/x
  3. Step 3: Cross multiply
    22,139.20x = 33,110.88 × 19,691.20
  4. Step 4: Simplify right side
    22,139.20x = 651,992,960.26
  5. Step 5: Solve for x
    x = 651,992,960.26/22,139.20
  6. Step 6: Final answer
    x = 29,449.71

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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.