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Finding the Third Proportional to 3,515 and 7,687

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Solution

The third proportional to 3,515 and 7,687 is: 16,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,515 : 7,687 = 7,687 : x
  2. Step 2: Convert to fraction form
    3,515/7,687 = 7,687/x
  3. Step 3: Cross multiply
    3,515x = 7,687 × 7,687
  4. Step 4: Simplify right side
    3,515x = 59,089,969
  5. Step 5: Solve for x
    x = 59,089,969/3,515
  6. Step 6: Final answer
    x = 16,810.80

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.