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Finding the Third Proportional to 7,161 and 15,411

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Solution

The third proportional to 7,161 and 15,411 is: 33,165.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,161 : 15,411 = 15,411 : x
  2. Step 2: Convert to fraction form
    7,161/15,411 = 15,411/x
  3. Step 3: Cross multiply
    7,161x = 15,411 × 15,411
  4. Step 4: Simplify right side
    7,161x = 237,498,921
  5. Step 5: Solve for x
    x = 237,498,921/7,161
  6. Step 6: Final answer
    x = 33,165.61

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.