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Finding the Third Proportional to 15,398 and 17,828

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Solution

The third proportional to 15,398 and 17,828 is: 20,641.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398 : 17,828 = 17,828 : x
  2. Step 2: Convert to fraction form
    15,398/17,828 = 17,828/x
  3. Step 3: Cross multiply
    15,398x = 17,828 × 17,828
  4. Step 4: Simplify right side
    15,398x = 317,837,584
  5. Step 5: Solve for x
    x = 317,837,584/15,398
  6. Step 6: Final answer
    x = 20,641.48

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.