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Finding the Third Proportional to 3,871.13 and 8,390.25

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Solution

The third proportional to 3,871.13 and 8,390.25 is: 18,184.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.13 : 8,390.25 = 8,390.25 : x
  2. Step 2: Convert to fraction form
    3,871.13/8,390.25 = 8,390.25/x
  3. Step 3: Cross multiply
    3,871.13x = 8,390.25 × 8,390.25
  4. Step 4: Simplify right side
    3,871.13x = 70,396,295.06
  5. Step 5: Solve for x
    x = 70,396,295.06/3,871.13
  6. Step 6: Final answer
    x = 18,184.97

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.