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Finding the Third Proportional to 3,860 and 9,020

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Solution

The third proportional to 3,860 and 9,020 is: 21,077.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860 : 9,020 = 9,020 : x
  2. Step 2: Convert to fraction form
    3,860/9,020 = 9,020/x
  3. Step 3: Cross multiply
    3,860x = 9,020 × 9,020
  4. Step 4: Simplify right side
    3,860x = 81,360,400
  5. Step 5: Solve for x
    x = 81,360,400/3,860
  6. Step 6: Final answer
    x = 21,077.82

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.