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Finding the Fourth Proportional to 8,751.15, 13,118.42 and 3,489.39

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Solution

The fourth proportional to 8,751.15, 13,118.42 and 3,489.39 is: 5,230.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,751.15 : 13,118.42 = 3,489.39 : x
  2. Step 2: Convert to fraction form
    8,751.15/13,118.42 = 3,489.39/x
  3. Step 3: Cross multiply
    8,751.15x = 13,118.42 × 3,489.39
  4. Step 4: Simplify right side
    8,751.15x = 45,775,348.02
  5. Step 5: Solve for x
    x = 45,775,348.02/8,751.15
  6. Step 6: Final answer
    x = 5,230.78

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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.