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Finding the Third Proportional to 18,721.13 and 27,919.69

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Solution

The third proportional to 18,721.13 and 27,919.69 is: 41,637.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.13 : 27,919.69 = 27,919.69 : x
  2. Step 2: Convert to fraction form
    18,721.13/27,919.69 = 27,919.69/x
  3. Step 3: Cross multiply
    18,721.13x = 27,919.69 × 27,919.69
  4. Step 4: Simplify right side
    18,721.13x = 779,508,950.10
  5. Step 5: Solve for x
    x = 779,508,950.10/18,721.13
  6. Step 6: Final answer
    x = 41,637.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.