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Finding the Third Proportional to 11,920 and 25,715

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Solution

The third proportional to 11,920 and 25,715 is: 55,474.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920 : 25,715 = 25,715 : x
  2. Step 2: Convert to fraction form
    11,920/25,715 = 25,715/x
  3. Step 3: Cross multiply
    11,920x = 25,715 × 25,715
  4. Step 4: Simplify right side
    11,920x = 661,261,225
  5. Step 5: Solve for x
    x = 661,261,225/11,920
  6. Step 6: Final answer
    x = 55,474.93

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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.