Home / 8,078.20-12,149.70-7,235.80

Finding the Fourth Proportional to 8,078.20, 12,149.70 and 7,235.80

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Solution

The fourth proportional to 8,078.20, 12,149.70 and 7,235.80 is: 10,882.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.20 : 12,149.70 = 7,235.80 : x
  2. Step 2: Convert to fraction form
    8,078.20/12,149.70 = 7,235.80/x
  3. Step 3: Cross multiply
    8,078.20x = 12,149.70 × 7,235.80
  4. Step 4: Simplify right side
    8,078.20x = 87,912,799.26
  5. Step 5: Solve for x
    x = 87,912,799.26/8,078.20
  6. Step 6: Final answer
    x = 10,882.72

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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.