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Finding the Fourth Proportional to 20,958.36, 31,441.42 and 6,919.37

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Solution

The fourth proportional to 20,958.36, 31,441.42 and 6,919.37 is: 10,380.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.36 : 31,441.42 = 6,919.37 : x
  2. Step 2: Convert to fraction form
    20,958.36/31,441.42 = 6,919.37/x
  3. Step 3: Cross multiply
    20,958.36x = 31,441.42 × 6,919.37
  4. Step 4: Simplify right side
    20,958.36x = 217,554,669.75
  5. Step 5: Solve for x
    x = 217,554,669.75/20,958.36
  6. Step 6: Final answer
    x = 10,380.33

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