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Finding the Third Proportional to 11,889 and 15,942

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Solution

The third proportional to 11,889 and 15,942 is: 21,376.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,889 : 15,942 = 15,942 : x
  2. Step 2: Convert to fraction form
    11,889/15,942 = 15,942/x
  3. Step 3: Cross multiply
    11,889x = 15,942 × 15,942
  4. Step 4: Simplify right side
    11,889x = 254,147,364
  5. Step 5: Solve for x
    x = 254,147,364/11,889
  6. Step 6: Final answer
    x = 21,376.68

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.