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Finding the Fourth Proportional to 8,155.62, 12,211.47 and 4,251.78

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Solution

The fourth proportional to 8,155.62, 12,211.47 and 4,251.78 is: 6,366.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,155.62 : 12,211.47 = 4,251.78 : x
  2. Step 2: Convert to fraction form
    8,155.62/12,211.47 = 4,251.78/x
  3. Step 3: Cross multiply
    8,155.62x = 12,211.47 × 4,251.78
  4. Step 4: Simplify right side
    8,155.62x = 51,920,483.92
  5. Step 5: Solve for x
    x = 51,920,483.92/8,155.62
  6. Step 6: Final answer
    x = 6,366.22

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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.