Home / 21,983.91-30,342.38-20,212.71

Finding the Fourth Proportional to 21,983.91, 30,342.38 and 20,212.71

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Solution

The fourth proportional to 21,983.91, 30,342.38 and 20,212.71 is: 27,897.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.91 : 30,342.38 = 20,212.71 : x
  2. Step 2: Convert to fraction form
    21,983.91/30,342.38 = 20,212.71/x
  3. Step 3: Cross multiply
    21,983.91x = 30,342.38 × 20,212.71
  4. Step 4: Simplify right side
    21,983.91x = 613,301,727.65
  5. Step 5: Solve for x
    x = 613,301,727.65/21,983.91
  6. Step 6: Final answer
    x = 27,897.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.