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Finding the Third Proportional to 16,728 and 18,888

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Solution

The third proportional to 16,728 and 18,888 is: 21,326.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,728 : 18,888 = 18,888 : x
  2. Step 2: Convert to fraction form
    16,728/18,888 = 18,888/x
  3. Step 3: Cross multiply
    16,728x = 18,888 × 18,888
  4. Step 4: Simplify right side
    16,728x = 356,756,544
  5. Step 5: Solve for x
    x = 356,756,544/16,728
  6. Step 6: Final answer
    x = 21,326.91

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.