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Finding the Fourth Proportional to 8,606.08, 12,909.12 and 3,985.92

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Solution

The fourth proportional to 8,606.08, 12,909.12 and 3,985.92 is: 5,978.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,606.08 : 12,909.12 = 3,985.92 : x
  2. Step 2: Convert to fraction form
    8,606.08/12,909.12 = 3,985.92/x
  3. Step 3: Cross multiply
    8,606.08x = 12,909.12 × 3,985.92
  4. Step 4: Simplify right side
    8,606.08x = 51,454,719.59
  5. Step 5: Solve for x
    x = 51,454,719.59/8,606.08
  6. Step 6: Final answer
    x = 5,978.88

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1.5x scale

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.