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Finding the Third Proportional to 4,115 and 6,685

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Solution

The third proportional to 4,115 and 6,685 is: 10,860.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,115 : 6,685 = 6,685 : x
  2. Step 2: Convert to fraction form
    4,115/6,685 = 6,685/x
  3. Step 3: Cross multiply
    4,115x = 6,685 × 6,685
  4. Step 4: Simplify right side
    4,115x = 44,689,225
  5. Step 5: Solve for x
    x = 44,689,225/4,115
  6. Step 6: Final answer
    x = 10,860.08

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.