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Finding the Third Proportional to 2,620 and 7,086

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Solution

The third proportional to 2,620 and 7,086 is: 19,164.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620 : 7,086 = 7,086 : x
  2. Step 2: Convert to fraction form
    2,620/7,086 = 7,086/x
  3. Step 3: Cross multiply
    2,620x = 7,086 × 7,086
  4. Step 4: Simplify right side
    2,620x = 50,211,396
  5. Step 5: Solve for x
    x = 50,211,396/2,620
  6. Step 6: Final answer
    x = 19,164.65

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.