Home / 8,131.16-12,188.36-3,198.80

Finding the Fourth Proportional to 8,131.16, 12,188.36 and 3,198.80

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Solution

The fourth proportional to 8,131.16, 12,188.36 and 3,198.80 is: 4,794.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,131.16 : 12,188.36 = 3,198.80 : x
  2. Step 2: Convert to fraction form
    8,131.16/12,188.36 = 3,198.80/x
  3. Step 3: Cross multiply
    8,131.16x = 12,188.36 × 3,198.80
  4. Step 4: Simplify right side
    8,131.16x = 38,988,125.97
  5. Step 5: Solve for x
    x = 38,988,125.97/8,131.16
  6. Step 6: Final answer
    x = 4,794.90

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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.