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Finding the Fourth Proportional to 8,617.89, 12,926.88 and 3,423.78

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Solution

The fourth proportional to 8,617.89, 12,926.88 and 3,423.78 is: 5,135.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.89 : 12,926.88 = 3,423.78 : x
  2. Step 2: Convert to fraction form
    8,617.89/12,926.88 = 3,423.78/x
  3. Step 3: Cross multiply
    8,617.89x = 12,926.88 × 3,423.78
  4. Step 4: Simplify right side
    8,617.89x = 44,258,793.21
  5. Step 5: Solve for x
    x = 44,258,793.21/8,617.89
  6. Step 6: Final answer
    x = 5,135.69

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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.