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Finding the Third Proportional to 11,280 and 16,855

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Solution

The third proportional to 11,280 and 16,855 is: 25,185.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280 : 16,855 = 16,855 : x
  2. Step 2: Convert to fraction form
    11,280/16,855 = 16,855/x
  3. Step 3: Cross multiply
    11,280x = 16,855 × 16,855
  4. Step 4: Simplify right side
    11,280x = 284,091,025
  5. Step 5: Solve for x
    x = 284,091,025/11,280
  6. Step 6: Final answer
    x = 25,185.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.