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Finding the Third Proportional to 7,728 and 11,268

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Solution

The third proportional to 7,728 and 11,268 is: 16,429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,728 : 11,268 = 11,268 : x
  2. Step 2: Convert to fraction form
    7,728/11,268 = 11,268/x
  3. Step 3: Cross multiply
    7,728x = 11,268 × 11,268
  4. Step 4: Simplify right side
    7,728x = 126,967,824
  5. Step 5: Solve for x
    x = 126,967,824/7,728
  6. Step 6: Final answer
    x = 16,429.58

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.