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Finding the Third Proportional to 17,638 and 38,430

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Solution

The third proportional to 17,638 and 38,430 is: 83,731.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,638 : 38,430 = 38,430 : x
  2. Step 2: Convert to fraction form
    17,638/38,430 = 38,430/x
  3. Step 3: Cross multiply
    17,638x = 38,430 × 38,430
  4. Step 4: Simplify right side
    17,638x = 1,476,864,900
  5. Step 5: Solve for x
    x = 1,476,864,900/17,638
  6. Step 6: Final answer
    x = 83,731.99

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.