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Finding the Fourth Proportional to 20,965.97, 31,447.93 and 7,817.32

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Solution

The fourth proportional to 20,965.97, 31,447.93 and 7,817.32 is: 11,725.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.97 : 31,447.93 = 7,817.32 : x
  2. Step 2: Convert to fraction form
    20,965.97/31,447.93 = 7,817.32/x
  3. Step 3: Cross multiply
    20,965.97x = 31,447.93 × 7,817.32
  4. Step 4: Simplify right side
    20,965.97x = 245,838,374.91
  5. Step 5: Solve for x
    x = 245,838,374.91/20,965.97
  6. Step 6: Final answer
    x = 11,725.59

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