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Finding the Third Proportional to 11,986 and 15,774

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Solution

The third proportional to 11,986 and 15,774 is: 20,759.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986 : 15,774 = 15,774 : x
  2. Step 2: Convert to fraction form
    11,986/15,774 = 15,774/x
  3. Step 3: Cross multiply
    11,986x = 15,774 × 15,774
  4. Step 4: Simplify right side
    11,986x = 248,819,076
  5. Step 5: Solve for x
    x = 248,819,076/11,986
  6. Step 6: Final answer
    x = 20,759.14

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.