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Finding the Third Proportional to 18,756 and 40,778

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Solution

The third proportional to 18,756 and 40,778 is: 88,656.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756 : 40,778 = 40,778 : x
  2. Step 2: Convert to fraction form
    18,756/40,778 = 40,778/x
  3. Step 3: Cross multiply
    18,756x = 40,778 × 40,778
  4. Step 4: Simplify right side
    18,756x = 1,662,845,284
  5. Step 5: Solve for x
    x = 1,662,845,284/18,756
  6. Step 6: Final answer
    x = 88,656.71

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.