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Finding the Fourth Proportional to 8,756.61, 12,084.14 and 4,979.68

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Solution

The fourth proportional to 8,756.61, 12,084.14 and 4,979.68 is: 6,871.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.61 : 12,084.14 = 4,979.68 : x
  2. Step 2: Convert to fraction form
    8,756.61/12,084.14 = 4,979.68/x
  3. Step 3: Cross multiply
    8,756.61x = 12,084.14 × 4,979.68
  4. Step 4: Simplify right side
    8,756.61x = 60,175,104.50
  5. Step 5: Solve for x
    x = 60,175,104.50/8,756.61
  6. Step 6: Final answer
    x = 6,871.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.