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Finding the Third Proportional to 16,689 and 36,455

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Solution

The third proportional to 16,689 and 36,455 is: 79,631.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,689 : 36,455 = 36,455 : x
  2. Step 2: Convert to fraction form
    16,689/36,455 = 36,455/x
  3. Step 3: Cross multiply
    16,689x = 36,455 × 36,455
  4. Step 4: Simplify right side
    16,689x = 1,328,967,025
  5. Step 5: Solve for x
    x = 1,328,967,025/16,689
  6. Step 6: Final answer
    x = 79,631.32

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.