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Finding the Fourth Proportional to 26,988, 40,481.92 and 20,759.12

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Solution

The fourth proportional to 26,988, 40,481.92 and 20,759.12 is: 31,138.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,988 : 40,481.92 = 20,759.12 : x
  2. Step 2: Convert to fraction form
    26,988/40,481.92 = 20,759.12/x
  3. Step 3: Cross multiply
    26,988x = 40,481.92 × 20,759.12
  4. Step 4: Simplify right side
    26,988x = 840,369,035.11
  5. Step 5: Solve for x
    x = 840,369,035.11/26,988
  6. Step 6: Final answer
    x = 31,138.62

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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.