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Finding the Third Proportional to 5,106 and 7,811

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Solution

The third proportional to 5,106 and 7,811 is: 11,949.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,106 : 7,811 = 7,811 : x
  2. Step 2: Convert to fraction form
    5,106/7,811 = 7,811/x
  3. Step 3: Cross multiply
    5,106x = 7,811 × 7,811
  4. Step 4: Simplify right side
    5,106x = 61,011,721
  5. Step 5: Solve for x
    x = 61,011,721/5,106
  6. Step 6: Final answer
    x = 11,949.02

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.