Home / 8,308.20-11,472.66-5,169.72

Finding the Fourth Proportional to 8,308.20, 11,472.66 and 5,169.72

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Solution

The fourth proportional to 8,308.20, 11,472.66 and 5,169.72 is: 7,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,308.20 : 11,472.66 = 5,169.72 : x
  2. Step 2: Convert to fraction form
    8,308.20/11,472.66 = 5,169.72/x
  3. Step 3: Cross multiply
    8,308.20x = 11,472.66 × 5,169.72
  4. Step 4: Simplify right side
    8,308.20x = 59,310,439.86
  5. Step 5: Solve for x
    x = 59,310,439.86/8,308.20
  6. Step 6: Final answer
    x = 7,138.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.