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Finding the Third Proportional to 3,986.72 and 8,520.19

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Solution

The third proportional to 3,986.72 and 8,520.19 is: 18,208.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.72 : 8,520.19 = 8,520.19 : x
  2. Step 2: Convert to fraction form
    3,986.72/8,520.19 = 8,520.19/x
  3. Step 3: Cross multiply
    3,986.72x = 8,520.19 × 8,520.19
  4. Step 4: Simplify right side
    3,986.72x = 72,593,595.04
  5. Step 5: Solve for x
    x = 72,593,595.04/3,986.72
  6. Step 6: Final answer
    x = 18,208.86

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.