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Finding the Third Proportional to 3,939.19 and 8,664.19

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Solution

The third proportional to 3,939.19 and 8,664.19 is: 19,056.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.19 : 8,664.19 = 8,664.19 : x
  2. Step 2: Convert to fraction form
    3,939.19/8,664.19 = 8,664.19/x
  3. Step 3: Cross multiply
    3,939.19x = 8,664.19 × 8,664.19
  4. Step 4: Simplify right side
    3,939.19x = 75,068,145.04
  5. Step 5: Solve for x
    x = 75,068,145.04/3,939.19
  6. Step 6: Final answer
    x = 19,056.76

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.