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Finding the Third Proportional to 15,740 and 17,372

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Solution

The third proportional to 15,740 and 17,372 is: 19,173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740 : 17,372 = 17,372 : x
  2. Step 2: Convert to fraction form
    15,740/17,372 = 17,372/x
  3. Step 3: Cross multiply
    15,740x = 17,372 × 17,372
  4. Step 4: Simplify right side
    15,740x = 301,786,384
  5. Step 5: Solve for x
    x = 301,786,384/15,740
  6. Step 6: Final answer
    x = 19,173.21

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.