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Finding the Third Proportional to 12,987 and 25,326

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Solution

The third proportional to 12,987 and 25,326 is: 49,388.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987 : 25,326 = 25,326 : x
  2. Step 2: Convert to fraction form
    12,987/25,326 = 25,326/x
  3. Step 3: Cross multiply
    12,987x = 25,326 × 25,326
  4. Step 4: Simplify right side
    12,987x = 641,406,276
  5. Step 5: Solve for x
    x = 641,406,276/12,987
  6. Step 6: Final answer
    x = 49,388.33

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.