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Finding the Third Proportional to 3,935 and 8,212

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Solution

The third proportional to 3,935 and 8,212 is: 17,137.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935 : 8,212 = 8,212 : x
  2. Step 2: Convert to fraction form
    3,935/8,212 = 8,212/x
  3. Step 3: Cross multiply
    3,935x = 8,212 × 8,212
  4. Step 4: Simplify right side
    3,935x = 67,436,944
  5. Step 5: Solve for x
    x = 67,436,944/3,935
  6. Step 6: Final answer
    x = 17,137.72

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.