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Finding the Fourth Proportional to 8,474.67, 12,709.98 and 2,928.21

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Solution

The fourth proportional to 8,474.67, 12,709.98 and 2,928.21 is: 4,391.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,474.67 : 12,709.98 = 2,928.21 : x
  2. Step 2: Convert to fraction form
    8,474.67/12,709.98 = 2,928.21/x
  3. Step 3: Cross multiply
    8,474.67x = 12,709.98 × 2,928.21
  4. Step 4: Simplify right side
    8,474.67x = 37,217,490.54
  5. Step 5: Solve for x
    x = 37,217,490.54/8,474.67
  6. Step 6: Final answer
    x = 4,391.62

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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.