Home / 8,811.92-12,158.52-5,979.80

Finding the Fourth Proportional to 8,811.92, 12,158.52 and 5,979.80

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Solution

The fourth proportional to 8,811.92, 12,158.52 and 5,979.80 is: 8,250.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.92 : 12,158.52 = 5,979.80 : x
  2. Step 2: Convert to fraction form
    8,811.92/12,158.52 = 5,979.80/x
  3. Step 3: Cross multiply
    8,811.92x = 12,158.52 × 5,979.80
  4. Step 4: Simplify right side
    8,811.92x = 72,705,517.90
  5. Step 5: Solve for x
    x = 72,705,517.90/8,811.92
  6. Step 6: Final answer
    x = 8,250.81

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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.