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Finding the Third Proportional to 5,042 and 8,131

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Solution

The third proportional to 5,042 and 8,131 is: 13,112.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,042 : 8,131 = 8,131 : x
  2. Step 2: Convert to fraction form
    5,042/8,131 = 8,131/x
  3. Step 3: Cross multiply
    5,042x = 8,131 × 8,131
  4. Step 4: Simplify right side
    5,042x = 66,113,161
  5. Step 5: Solve for x
    x = 66,113,161/5,042
  6. Step 6: Final answer
    x = 13,112.49

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.