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Finding the Third Proportional to 19,131 and 40,540

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Solution

The third proportional to 19,131 and 40,540 is: 85,907.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,131 : 40,540 = 40,540 : x
  2. Step 2: Convert to fraction form
    19,131/40,540 = 40,540/x
  3. Step 3: Cross multiply
    19,131x = 40,540 × 40,540
  4. Step 4: Simplify right side
    19,131x = 1,643,491,600
  5. Step 5: Solve for x
    x = 1,643,491,600/19,131
  6. Step 6: Final answer
    x = 85,907.25

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.