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Finding the Fourth Proportional to 8,652.42, 12,978.76 and 3,387.14

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Solution

The fourth proportional to 8,652.42, 12,978.76 and 3,387.14 is: 5,080.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.42 : 12,978.76 = 3,387.14 : x
  2. Step 2: Convert to fraction form
    8,652.42/12,978.76 = 3,387.14/x
  3. Step 3: Cross multiply
    8,652.42x = 12,978.76 × 3,387.14
  4. Step 4: Simplify right side
    8,652.42x = 43,960,877.15
  5. Step 5: Solve for x
    x = 43,960,877.15/8,652.42
  6. Step 6: Final answer
    x = 5,080.76

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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.