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Finding the Third Proportional to 15,855 and 34,215

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Solution

The third proportional to 15,855 and 34,215 is: 73,835.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855 : 34,215 = 34,215 : x
  2. Step 2: Convert to fraction form
    15,855/34,215 = 34,215/x
  3. Step 3: Cross multiply
    15,855x = 34,215 × 34,215
  4. Step 4: Simplify right side
    15,855x = 1,170,666,225
  5. Step 5: Solve for x
    x = 1,170,666,225/15,855
  6. Step 6: Final answer
    x = 73,835.78

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.