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Finding the Fourth Proportional to 19,900.80, 29,861.64 and 8,815.32

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Solution

The fourth proportional to 19,900.80, 29,861.64 and 8,815.32 is: 13,227.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,900.80 : 29,861.64 = 8,815.32 : x
  2. Step 2: Convert to fraction form
    19,900.80/29,861.64 = 8,815.32/x
  3. Step 3: Cross multiply
    19,900.80x = 29,861.64 × 8,815.32
  4. Step 4: Simplify right side
    19,900.80x = 263,239,912.32
  5. Step 5: Solve for x
    x = 263,239,912.32/19,900.80
  6. Step 6: Final answer
    x = 13,227.60

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