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Finding the Fourth Proportional to 8,617.90, 12,926.88 and 3,423.76

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Solution

The fourth proportional to 8,617.90, 12,926.88 and 3,423.76 is: 5,135.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.90 : 12,926.88 = 3,423.76 : x
  2. Step 2: Convert to fraction form
    8,617.90/12,926.88 = 3,423.76/x
  3. Step 3: Cross multiply
    8,617.90x = 12,926.88 × 3,423.76
  4. Step 4: Simplify right side
    8,617.90x = 44,258,534.67
  5. Step 5: Solve for x
    x = 44,258,534.67/8,617.90
  6. Step 6: Final answer
    x = 5,135.65

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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.