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Finding the Third Proportional to 4,116 and 8,115

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Solution

The third proportional to 4,116 and 8,115 is: 15,999.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,116 : 8,115 = 8,115 : x
  2. Step 2: Convert to fraction form
    4,116/8,115 = 8,115/x
  3. Step 3: Cross multiply
    4,116x = 8,115 × 8,115
  4. Step 4: Simplify right side
    4,116x = 65,853,225
  5. Step 5: Solve for x
    x = 65,853,225/4,116
  6. Step 6: Final answer
    x = 15,999.33

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.