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Finding the Third Proportional to 15,220 and 31,646

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Solution

The third proportional to 15,220 and 31,646 is: 65,799.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220 : 31,646 = 31,646 : x
  2. Step 2: Convert to fraction form
    15,220/31,646 = 31,646/x
  3. Step 3: Cross multiply
    15,220x = 31,646 × 31,646
  4. Step 4: Simplify right side
    15,220x = 1,001,469,316
  5. Step 5: Solve for x
    x = 1,001,469,316/15,220
  6. Step 6: Final answer
    x = 65,799.56

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.