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Finding the Third Proportional to 11,862 and 18,389

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Solution

The third proportional to 11,862 and 18,389 is: 28,507.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,862 : 18,389 = 18,389 : x
  2. Step 2: Convert to fraction form
    11,862/18,389 = 18,389/x
  3. Step 3: Cross multiply
    11,862x = 18,389 × 18,389
  4. Step 4: Simplify right side
    11,862x = 338,155,321
  5. Step 5: Solve for x
    x = 338,155,321/11,862
  6. Step 6: Final answer
    x = 28,507.45

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.