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Finding the Fourth Proportional to 8,979.96, 12,391.95 and 5,000.97

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Solution

The fourth proportional to 8,979.96, 12,391.95 and 5,000.97 is: 6,901.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.96 : 12,391.95 = 5,000.97 : x
  2. Step 2: Convert to fraction form
    8,979.96/12,391.95 = 5,000.97/x
  3. Step 3: Cross multiply
    8,979.96x = 12,391.95 × 5,000.97
  4. Step 4: Simplify right side
    8,979.96x = 61,971,770.19
  5. Step 5: Solve for x
    x = 61,971,770.19/8,979.96
  6. Step 6: Final answer
    x = 6,901.12

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1.5x scale

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.