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Finding the Third Proportional to 1,939.69 and 4,186.97

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Solution

The third proportional to 1,939.69 and 4,186.97 is: 9,037.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.69 : 4,186.97 = 4,186.97 : x
  2. Step 2: Convert to fraction form
    1,939.69/4,186.97 = 4,186.97/x
  3. Step 3: Cross multiply
    1,939.69x = 4,186.97 × 4,186.97
  4. Step 4: Simplify right side
    1,939.69x = 17,530,707.31
  5. Step 5: Solve for x
    x = 17,530,707.31/1,939.69
  6. Step 6: Final answer
    x = 9,037.90

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.