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Finding the Third Proportional to 5,191 and 7,765

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Solution

The third proportional to 5,191 and 7,765 is: 11,615.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,191 : 7,765 = 7,765 : x
  2. Step 2: Convert to fraction form
    5,191/7,765 = 7,765/x
  3. Step 3: Cross multiply
    5,191x = 7,765 × 7,765
  4. Step 4: Simplify right side
    5,191x = 60,295,225
  5. Step 5: Solve for x
    x = 60,295,225/5,191
  6. Step 6: Final answer
    x = 11,615.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.