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Finding the Third Proportional to 15,872 and 17,440

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Solution

The third proportional to 15,872 and 17,440 is: 19,162.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,872 : 17,440 = 17,440 : x
  2. Step 2: Convert to fraction form
    15,872/17,440 = 17,440/x
  3. Step 3: Cross multiply
    15,872x = 17,440 × 17,440
  4. Step 4: Simplify right side
    15,872x = 304,153,600
  5. Step 5: Solve for x
    x = 304,153,600/15,872
  6. Step 6: Final answer
    x = 19,162.90

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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.