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Finding the Fourth Proportional to 7,955.81, 11,934.18 and 2,112.40

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Solution

The fourth proportional to 7,955.81, 11,934.18 and 2,112.40 is: 3,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,955.81 : 11,934.18 = 2,112.40 : x
  2. Step 2: Convert to fraction form
    7,955.81/11,934.18 = 2,112.40/x
  3. Step 3: Cross multiply
    7,955.81x = 11,934.18 × 2,112.40
  4. Step 4: Simplify right side
    7,955.81x = 25,209,761.83
  5. Step 5: Solve for x
    x = 25,209,761.83/7,955.81
  6. Step 6: Final answer
    x = 3,168.72

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