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Finding the Third Proportional to 18,987 and 27,783

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Solution

The third proportional to 18,987 and 27,783 is: 40,653.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987 : 27,783 = 27,783 : x
  2. Step 2: Convert to fraction form
    18,987/27,783 = 27,783/x
  3. Step 3: Cross multiply
    18,987x = 27,783 × 27,783
  4. Step 4: Simplify right side
    18,987x = 771,895,089
  5. Step 5: Solve for x
    x = 771,895,089/18,987
  6. Step 6: Final answer
    x = 40,653.87

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.