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Finding the Third Proportional to 7,790 and 16,687

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Solution

The third proportional to 7,790 and 16,687 is: 35,745.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,790 : 16,687 = 16,687 : x
  2. Step 2: Convert to fraction form
    7,790/16,687 = 16,687/x
  3. Step 3: Cross multiply
    7,790x = 16,687 × 16,687
  4. Step 4: Simplify right side
    7,790x = 278,455,969
  5. Step 5: Solve for x
    x = 278,455,969/7,790
  6. Step 6: Final answer
    x = 35,745.31

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.