Home / 20,919.24-31,379.46-6,128.17

Finding the Fourth Proportional to 20,919.24, 31,379.46 and 6,128.17

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Solution

The fourth proportional to 20,919.24, 31,379.46 and 6,128.17 is: 9,192.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.24 : 31,379.46 = 6,128.17 : x
  2. Step 2: Convert to fraction form
    20,919.24/31,379.46 = 6,128.17/x
  3. Step 3: Cross multiply
    20,919.24x = 31,379.46 × 6,128.17
  4. Step 4: Simplify right side
    20,919.24x = 192,298,563.96
  5. Step 5: Solve for x
    x = 192,298,563.96/20,919.24
  6. Step 6: Final answer
    x = 9,192.43

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