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Finding the Third Proportional to 17,310 and 19,860

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Solution

The third proportional to 17,310 and 19,860 is: 22,785.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,310 : 19,860 = 19,860 : x
  2. Step 2: Convert to fraction form
    17,310/19,860 = 19,860/x
  3. Step 3: Cross multiply
    17,310x = 19,860 × 19,860
  4. Step 4: Simplify right side
    17,310x = 394,419,600
  5. Step 5: Solve for x
    x = 394,419,600/17,310
  6. Step 6: Final answer
    x = 22,785.65

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.