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Finding the Fourth Proportional to 8,310.49, 12,471.18 and 3,928.39

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Solution

The fourth proportional to 8,310.49, 12,471.18 and 3,928.39 is: 5,895.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,310.49 : 12,471.18 = 3,928.39 : x
  2. Step 2: Convert to fraction form
    8,310.49/12,471.18 = 3,928.39/x
  3. Step 3: Cross multiply
    8,310.49x = 12,471.18 × 3,928.39
  4. Step 4: Simplify right side
    8,310.49x = 48,991,658.80
  5. Step 5: Solve for x
    x = 48,991,658.80/8,310.49
  6. Step 6: Final answer
    x = 5,895.16

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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.