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Finding the Third Proportional to 4,120 and 9,028

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Solution

The third proportional to 4,120 and 9,028 is: 19,782.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,120 : 9,028 = 9,028 : x
  2. Step 2: Convert to fraction form
    4,120/9,028 = 9,028/x
  3. Step 3: Cross multiply
    4,120x = 9,028 × 9,028
  4. Step 4: Simplify right side
    4,120x = 81,504,784
  5. Step 5: Solve for x
    x = 81,504,784/4,120
  6. Step 6: Final answer
    x = 19,782.71

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.