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Finding the Third Proportional to 12,882 and 19,731

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Solution

The third proportional to 12,882 and 19,731 is: 30,221.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,882 : 19,731 = 19,731 : x
  2. Step 2: Convert to fraction form
    12,882/19,731 = 19,731/x
  3. Step 3: Cross multiply
    12,882x = 19,731 × 19,731
  4. Step 4: Simplify right side
    12,882x = 389,312,361
  5. Step 5: Solve for x
    x = 389,312,361/12,882
  6. Step 6: Final answer
    x = 30,221.42

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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.