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Finding the Third Proportional to 3,858 and 7,989.50

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Solution

The third proportional to 3,858 and 7,989.50 is: 16,545.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858 : 7,989.50 = 7,989.50 : x
  2. Step 2: Convert to fraction form
    3,858/7,989.50 = 7,989.50/x
  3. Step 3: Cross multiply
    3,858x = 7,989.50 × 7,989.50
  4. Step 4: Simplify right side
    3,858x = 63,832,110.25
  5. Step 5: Solve for x
    x = 63,832,110.25/3,858
  6. Step 6: Final answer
    x = 16,545.39

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.