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Finding the Third Proportional to 7,611 and 15,431

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Solution

The third proportional to 7,611 and 15,431 is: 31,285.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,611 : 15,431 = 15,431 : x
  2. Step 2: Convert to fraction form
    7,611/15,431 = 15,431/x
  3. Step 3: Cross multiply
    7,611x = 15,431 × 15,431
  4. Step 4: Simplify right side
    7,611x = 238,115,761
  5. Step 5: Solve for x
    x = 238,115,761/7,611
  6. Step 6: Final answer
    x = 31,285.74

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.