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Finding the Third Proportional to 3,928.94 and 8,472.94

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Solution

The third proportional to 3,928.94 and 8,472.94 is: 18,272.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.94 : 8,472.94 = 8,472.94 : x
  2. Step 2: Convert to fraction form
    3,928.94/8,472.94 = 8,472.94/x
  3. Step 3: Cross multiply
    3,928.94x = 8,472.94 × 8,472.94
  4. Step 4: Simplify right side
    3,928.94x = 71,790,669.88
  5. Step 5: Solve for x
    x = 71,790,669.88/3,928.94
  6. Step 6: Final answer
    x = 18,272.29

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.