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Finding the Third Proportional to 18,020 and 27,790

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Solution

The third proportional to 18,020 and 27,790 is: 42,857.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,020 : 27,790 = 27,790 : x
  2. Step 2: Convert to fraction form
    18,020/27,790 = 27,790/x
  3. Step 3: Cross multiply
    18,020x = 27,790 × 27,790
  4. Step 4: Simplify right side
    18,020x = 772,284,100
  5. Step 5: Solve for x
    x = 772,284,100/18,020
  6. Step 6: Final answer
    x = 42,857.05

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.