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Finding the Third Proportional to 2,756 and 5,212

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Solution

The third proportional to 2,756 and 5,212 is: 9,856.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756 : 5,212 = 5,212 : x
  2. Step 2: Convert to fraction form
    2,756/5,212 = 5,212/x
  3. Step 3: Cross multiply
    2,756x = 5,212 × 5,212
  4. Step 4: Simplify right side
    2,756x = 27,164,944
  5. Step 5: Solve for x
    x = 27,164,944/2,756
  6. Step 6: Final answer
    x = 9,856.66

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Why These Related Problems?

These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.