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Finding the Fourth Proportional to 8,708.92, 13,061.90 and 2,865.56

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Solution

The fourth proportional to 8,708.92, 13,061.90 and 2,865.56 is: 4,297.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.92 : 13,061.90 = 2,865.56 : x
  2. Step 2: Convert to fraction form
    8,708.92/13,061.90 = 2,865.56/x
  3. Step 3: Cross multiply
    8,708.92x = 13,061.90 × 2,865.56
  4. Step 4: Simplify right side
    8,708.92x = 37,429,658.16
  5. Step 5: Solve for x
    x = 37,429,658.16/8,708.92
  6. Step 6: Final answer
    x = 4,297.85

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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.