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Finding the Third Proportional to 5,015 and 7,805

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Solution

The third proportional to 5,015 and 7,805 is: 12,147.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015 : 7,805 = 7,805 : x
  2. Step 2: Convert to fraction form
    5,015/7,805 = 7,805/x
  3. Step 3: Cross multiply
    5,015x = 7,805 × 7,805
  4. Step 4: Simplify right side
    5,015x = 60,918,025
  5. Step 5: Solve for x
    x = 60,918,025/5,015
  6. Step 6: Final answer
    x = 12,147.16

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.