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Finding the Fourth Proportional to 8,600.91, 12,903.60 and 2,979.75

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Solution

The fourth proportional to 8,600.91, 12,903.60 and 2,979.75 is: 4,470.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,600.91 : 12,903.60 = 2,979.75 : x
  2. Step 2: Convert to fraction form
    8,600.91/12,903.60 = 2,979.75/x
  3. Step 3: Cross multiply
    8,600.91x = 12,903.60 × 2,979.75
  4. Step 4: Simplify right side
    8,600.91x = 38,449,502.10
  5. Step 5: Solve for x
    x = 38,449,502.10/8,600.91
  6. Step 6: Final answer
    x = 4,470.40

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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.