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Finding the Fourth Proportional to 10,508.78, 15,763.13 and 3,489.32

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Solution

The fourth proportional to 10,508.78, 15,763.13 and 3,489.32 is: 5,233.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,508.78 : 15,763.13 = 3,489.32 : x
  2. Step 2: Convert to fraction form
    10,508.78/15,763.13 = 3,489.32/x
  3. Step 3: Cross multiply
    10,508.78x = 15,763.13 × 3,489.32
  4. Step 4: Simplify right side
    10,508.78x = 55,002,604.77
  5. Step 5: Solve for x
    x = 55,002,604.77/10,508.78
  6. Step 6: Final answer
    x = 5,233.97

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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.