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Finding the Third Proportional to 12,992 and 15,936

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Solution

The third proportional to 12,992 and 15,936 is: 19,547.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,992 : 15,936 = 15,936 : x
  2. Step 2: Convert to fraction form
    12,992/15,936 = 15,936/x
  3. Step 3: Cross multiply
    12,992x = 15,936 × 15,936
  4. Step 4: Simplify right side
    12,992x = 253,956,096
  5. Step 5: Solve for x
    x = 253,956,096/12,992
  6. Step 6: Final answer
    x = 19,547.11

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Why These Related Problems?

These problems maintain the same ratio (1.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.