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Finding the Third Proportional to 2,142 and 4,068

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Solution

The third proportional to 2,142 and 4,068 is: 7,725.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142 : 4,068 = 4,068 : x
  2. Step 2: Convert to fraction form
    2,142/4,068 = 4,068/x
  3. Step 3: Cross multiply
    2,142x = 4,068 × 4,068
  4. Step 4: Simplify right side
    2,142x = 16,548,624
  5. Step 5: Solve for x
    x = 16,548,624/2,142
  6. Step 6: Final answer
    x = 7,725.78

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.