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Finding the Third Proportional to 17,939 and 39,206

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Solution

The third proportional to 17,939 and 39,206 is: 85,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,939 : 39,206 = 39,206 : x
  2. Step 2: Convert to fraction form
    17,939/39,206 = 39,206/x
  3. Step 3: Cross multiply
    17,939x = 39,206 × 39,206
  4. Step 4: Simplify right side
    17,939x = 1,537,110,436
  5. Step 5: Solve for x
    x = 1,537,110,436/17,939
  6. Step 6: Final answer
    x = 85,685.40

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.