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Finding the Third Proportional to 17,515 and 26,209

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Solution

The third proportional to 17,515 and 26,209 is: 39,218.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,515 : 26,209 = 26,209 : x
  2. Step 2: Convert to fraction form
    17,515/26,209 = 26,209/x
  3. Step 3: Cross multiply
    17,515x = 26,209 × 26,209
  4. Step 4: Simplify right side
    17,515x = 686,911,681
  5. Step 5: Solve for x
    x = 686,911,681/17,515
  6. Step 6: Final answer
    x = 39,218.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.