Home / 8,123.20-12,183.90-6,659.80

Finding the Fourth Proportional to 8,123.20, 12,183.90 and 6,659.80

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Solution

The fourth proportional to 8,123.20, 12,183.90 and 6,659.80 is: 9,988.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.20 : 12,183.90 = 6,659.80 : x
  2. Step 2: Convert to fraction form
    8,123.20/12,183.90 = 6,659.80/x
  3. Step 3: Cross multiply
    8,123.20x = 12,183.90 × 6,659.80
  4. Step 4: Simplify right side
    8,123.20x = 81,142,337.22
  5. Step 5: Solve for x
    x = 81,142,337.22/8,123.20
  6. Step 6: Final answer
    x = 9,988.96

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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.