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Finding the Fourth Proportional to 8,912.32, 12,286.18 and 6,251.48

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Solution

The fourth proportional to 8,912.32, 12,286.18 and 6,251.48 is: 8,618.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.32 : 12,286.18 = 6,251.48 : x
  2. Step 2: Convert to fraction form
    8,912.32/12,286.18 = 6,251.48/x
  3. Step 3: Cross multiply
    8,912.32x = 12,286.18 × 6,251.48
  4. Step 4: Simplify right side
    8,912.32x = 76,806,808.55
  5. Step 5: Solve for x
    x = 76,806,808.55/8,912.32
  6. Step 6: Final answer
    x = 8,618.05

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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.