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Finding the Third Proportional to 11,272 and 18,020

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Solution

The third proportional to 11,272 and 18,020 is: 28,807.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,272 : 18,020 = 18,020 : x
  2. Step 2: Convert to fraction form
    11,272/18,020 = 18,020/x
  3. Step 3: Cross multiply
    11,272x = 18,020 × 18,020
  4. Step 4: Simplify right side
    11,272x = 324,720,400
  5. Step 5: Solve for x
    x = 324,720,400/11,272
  6. Step 6: Final answer
    x = 28,807.70

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.