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Finding the Third Proportional to 9,728 and 19,936

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Solution

The third proportional to 9,728 and 19,936 is: 40,855.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,728 : 19,936 = 19,936 : x
  2. Step 2: Convert to fraction form
    9,728/19,936 = 19,936/x
  3. Step 3: Cross multiply
    9,728x = 19,936 × 19,936
  4. Step 4: Simplify right side
    9,728x = 397,444,096
  5. Step 5: Solve for x
    x = 397,444,096/9,728
  6. Step 6: Final answer
    x = 40,855.68

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.