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Finding the Third Proportional to 5,640 and 13,251

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Solution

The third proportional to 5,640 and 13,251 is: 31,132.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640 : 13,251 = 13,251 : x
  2. Step 2: Convert to fraction form
    5,640/13,251 = 13,251/x
  3. Step 3: Cross multiply
    5,640x = 13,251 × 13,251
  4. Step 4: Simplify right side
    5,640x = 175,589,001
  5. Step 5: Solve for x
    x = 175,589,001/5,640
  6. Step 6: Final answer
    x = 31,132.80

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.