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Finding the Fourth Proportional to 8,780.80, 13,169.22 and 2,539.43

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Solution

The fourth proportional to 8,780.80, 13,169.22 and 2,539.43 is: 3,808.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.80 : 13,169.22 = 2,539.43 : x
  2. Step 2: Convert to fraction form
    8,780.80/13,169.22 = 2,539.43/x
  3. Step 3: Cross multiply
    8,780.80x = 13,169.22 × 2,539.43
  4. Step 4: Simplify right side
    8,780.80x = 33,442,246.50
  5. Step 5: Solve for x
    x = 33,442,246.50/8,780.80
  6. Step 6: Final answer
    x = 3,808.56

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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.