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Finding the Third Proportional to 2,163 and 4,386

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Solution

The third proportional to 2,163 and 4,386 is: 8,893.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163 : 4,386 = 4,386 : x
  2. Step 2: Convert to fraction form
    2,163/4,386 = 4,386/x
  3. Step 3: Cross multiply
    2,163x = 4,386 × 4,386
  4. Step 4: Simplify right side
    2,163x = 19,236,996
  5. Step 5: Solve for x
    x = 19,236,996/2,163
  6. Step 6: Final answer
    x = 8,893.66

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.