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Finding the Fourth Proportional to 8,660.16, 12,979.08 and 6,319.98

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Solution

The fourth proportional to 8,660.16, 12,979.08 and 6,319.98 is: 9,471.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.16 : 12,979.08 = 6,319.98 : x
  2. Step 2: Convert to fraction form
    8,660.16/12,979.08 = 6,319.98/x
  3. Step 3: Cross multiply
    8,660.16x = 12,979.08 × 6,319.98
  4. Step 4: Simplify right side
    8,660.16x = 82,027,526.02
  5. Step 5: Solve for x
    x = 82,027,526.02/8,660.16
  6. Step 6: Final answer
    x = 9,471.83

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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.