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Finding the Fourth Proportional to 8,782.75, 13,179.30 and 3,239.97

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Solution

The fourth proportional to 8,782.75, 13,179.30 and 3,239.97 is: 4,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.75 : 13,179.30 = 3,239.97 : x
  2. Step 2: Convert to fraction form
    8,782.75/13,179.30 = 3,239.97/x
  3. Step 3: Cross multiply
    8,782.75x = 13,179.30 × 3,239.97
  4. Step 4: Simplify right side
    8,782.75x = 42,700,536.62
  5. Step 5: Solve for x
    x = 42,700,536.62/8,782.75
  6. Step 6: Final answer
    x = 4,861.86

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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.