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Finding the Third Proportional to 2,947 and 4,086

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Solution

The third proportional to 2,947 and 4,086 is: 5,665.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947 : 4,086 = 4,086 : x
  2. Step 2: Convert to fraction form
    2,947/4,086 = 4,086/x
  3. Step 3: Cross multiply
    2,947x = 4,086 × 4,086
  4. Step 4: Simplify right side
    2,947x = 16,695,396
  5. Step 5: Solve for x
    x = 16,695,396/2,947
  6. Step 6: Final answer
    x = 5,665.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.