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Finding the Fourth Proportional to 8,255.80, 12,366.90 and 5,126.20

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Solution

The fourth proportional to 8,255.80, 12,366.90 and 5,126.20 is: 7,678.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,255.80 : 12,366.90 = 5,126.20 : x
  2. Step 2: Convert to fraction form
    8,255.80/12,366.90 = 5,126.20/x
  3. Step 3: Cross multiply
    8,255.80x = 12,366.90 × 5,126.20
  4. Step 4: Simplify right side
    8,255.80x = 63,395,202.78
  5. Step 5: Solve for x
    x = 63,395,202.78/8,255.80
  6. Step 6: Final answer
    x = 7,678.87

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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.