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Finding the Fourth Proportional to 8,654.48, 12,979.89 and 3,108.14

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Solution

The fourth proportional to 8,654.48, 12,979.89 and 3,108.14 is: 4,661.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,654.48 : 12,979.89 = 3,108.14 : x
  2. Step 2: Convert to fraction form
    8,654.48/12,979.89 = 3,108.14/x
  3. Step 3: Cross multiply
    8,654.48x = 12,979.89 × 3,108.14
  4. Step 4: Simplify right side
    8,654.48x = 40,343,250.41
  5. Step 5: Solve for x
    x = 40,343,250.41/8,654.48
  6. Step 6: Final answer
    x = 4,661.55

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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.