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Finding the Third Proportional to 18,756 and 40,427

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Solution

The third proportional to 18,756 and 40,427 is: 87,137.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756 : 40,427 = 40,427 : x
  2. Step 2: Convert to fraction form
    18,756/40,427 = 40,427/x
  3. Step 3: Cross multiply
    18,756x = 40,427 × 40,427
  4. Step 4: Simplify right side
    18,756x = 1,634,342,329
  5. Step 5: Solve for x
    x = 1,634,342,329/18,756
  6. Step 6: Final answer
    x = 87,137.04

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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.