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Finding the Third Proportional to 1,986 and 4,016

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Solution

The third proportional to 1,986 and 4,016 is: 8,120.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986 : 4,016 = 4,016 : x
  2. Step 2: Convert to fraction form
    1,986/4,016 = 4,016/x
  3. Step 3: Cross multiply
    1,986x = 4,016 × 4,016
  4. Step 4: Simplify right side
    1,986x = 16,128,256
  5. Step 5: Solve for x
    x = 16,128,256/1,986
  6. Step 6: Final answer
    x = 8,120.97

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.