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Finding the Third Proportional to 1,872 and 5,085

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Solution

The third proportional to 1,872 and 5,085 is: 13,812.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872 : 5,085 = 5,085 : x
  2. Step 2: Convert to fraction form
    1,872/5,085 = 5,085/x
  3. Step 3: Cross multiply
    1,872x = 5,085 × 5,085
  4. Step 4: Simplify right side
    1,872x = 25,857,225
  5. Step 5: Solve for x
    x = 25,857,225/1,872
  6. Step 6: Final answer
    x = 13,812.62

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Why These Related Problems?

These problems maintain the same ratio (2.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.