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Finding the Fourth Proportional to 10,620.28, 15,930 and 3,600.82

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Solution

The fourth proportional to 10,620.28, 15,930 and 3,600.82 is: 5,401.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,620.28 : 15,930 = 3,600.82 : x
  2. Step 2: Convert to fraction form
    10,620.28/15,930 = 3,600.82/x
  3. Step 3: Cross multiply
    10,620.28x = 15,930 × 3,600.82
  4. Step 4: Simplify right side
    10,620.28x = 57,361,062.60
  5. Step 5: Solve for x
    x = 57,361,062.60/10,620.28
  6. Step 6: Final answer
    x = 5,401.09

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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.