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Finding the Fourth Proportional to 8,581.92, 12,879.26 and 3,039.90

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Solution

The fourth proportional to 8,581.92, 12,879.26 and 3,039.90 is: 4,562.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.92 : 12,879.26 = 3,039.90 : x
  2. Step 2: Convert to fraction form
    8,581.92/12,879.26 = 3,039.90/x
  3. Step 3: Cross multiply
    8,581.92x = 12,879.26 × 3,039.90
  4. Step 4: Simplify right side
    8,581.92x = 39,151,647.27
  5. Step 5: Solve for x
    x = 39,151,647.27/8,581.92
  6. Step 6: Final answer
    x = 4,562.11

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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.