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Finding the Fourth Proportional to 8,147.80, 12,221.70 and 2,951.56

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Solution

The fourth proportional to 8,147.80, 12,221.70 and 2,951.56 is: 4,427.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,147.80 : 12,221.70 = 2,951.56 : x
  2. Step 2: Convert to fraction form
    8,147.80/12,221.70 = 2,951.56/x
  3. Step 3: Cross multiply
    8,147.80x = 12,221.70 × 2,951.56
  4. Step 4: Simplify right side
    8,147.80x = 36,073,080.85
  5. Step 5: Solve for x
    x = 36,073,080.85/8,147.80
  6. Step 6: Final answer
    x = 4,427.34

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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.