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Finding the Third Proportional to 10,986 and 15,108

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Solution

The third proportional to 10,986 and 15,108 is: 20,776.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,986 : 15,108 = 15,108 : x
  2. Step 2: Convert to fraction form
    10,986/15,108 = 15,108/x
  3. Step 3: Cross multiply
    10,986x = 15,108 × 15,108
  4. Step 4: Simplify right side
    10,986x = 228,251,664
  5. Step 5: Solve for x
    x = 228,251,664/10,986
  6. Step 6: Final answer
    x = 20,776.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.