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Finding the Fourth Proportional to 21,286.62, 31,931.73 and 7,256.31

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Solution

The fourth proportional to 21,286.62, 31,931.73 and 7,256.31 is: 10,885.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.62 : 31,931.73 = 7,256.31 : x
  2. Step 2: Convert to fraction form
    21,286.62/31,931.73 = 7,256.31/x
  3. Step 3: Cross multiply
    21,286.62x = 31,931.73 × 7,256.31
  4. Step 4: Simplify right side
    21,286.62x = 231,706,531.72
  5. Step 5: Solve for x
    x = 231,706,531.72/21,286.62
  6. Step 6: Final answer
    x = 10,885.08

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