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Finding the Fourth Proportional to 20,956.67, 31,438.89 and 6,917.67

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Solution

The fourth proportional to 20,956.67, 31,438.89 and 6,917.67 is: 10,377.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.67 : 31,438.89 = 6,917.67 : x
  2. Step 2: Convert to fraction form
    20,956.67/31,438.89 = 6,917.67/x
  3. Step 3: Cross multiply
    20,956.67x = 31,438.89 × 6,917.67
  4. Step 4: Simplify right side
    20,956.67x = 217,483,984.08
  5. Step 5: Solve for x
    x = 217,483,984.08/20,956.67
  6. Step 6: Final answer
    x = 10,377.79

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