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Finding the Third Proportional to 19,640 and 27,618

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Solution

The third proportional to 19,640 and 27,618 is: 38,836.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640 : 27,618 = 27,618 : x
  2. Step 2: Convert to fraction form
    19,640/27,618 = 27,618/x
  3. Step 3: Cross multiply
    19,640x = 27,618 × 27,618
  4. Step 4: Simplify right side
    19,640x = 762,753,924
  5. Step 5: Solve for x
    x = 762,753,924/19,640
  6. Step 6: Final answer
    x = 38,836.76

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.