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Finding the Third Proportional to 3,531.50 and 7,678

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Solution

The third proportional to 3,531.50 and 7,678 is: 16,693.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,531.50 : 7,678 = 7,678 : x
  2. Step 2: Convert to fraction form
    3,531.50/7,678 = 7,678/x
  3. Step 3: Cross multiply
    3,531.50x = 7,678 × 7,678
  4. Step 4: Simplify right side
    3,531.50x = 58,951,684
  5. Step 5: Solve for x
    x = 58,951,684/3,531.50
  6. Step 6: Final answer
    x = 16,693.10

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.