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Finding the Third Proportional to 6,515 and 15,761

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Solution

The third proportional to 6,515 and 15,761 is: 38,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,515 : 15,761 = 15,761 : x
  2. Step 2: Convert to fraction form
    6,515/15,761 = 15,761/x
  3. Step 3: Cross multiply
    6,515x = 15,761 × 15,761
  4. Step 4: Simplify right side
    6,515x = 248,409,121
  5. Step 5: Solve for x
    x = 248,409,121/6,515
  6. Step 6: Final answer
    x = 38,128.80

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.