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Finding the Fourth Proportional to 15,705.04, 21,673.41 and 8,631.92

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Solution

The fourth proportional to 15,705.04, 21,673.41 and 8,631.92 is: 11,912.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,705.04 : 21,673.41 = 8,631.92 : x
  2. Step 2: Convert to fraction form
    15,705.04/21,673.41 = 8,631.92/x
  3. Step 3: Cross multiply
    15,705.04x = 21,673.41 × 8,631.92
  4. Step 4: Simplify right side
    15,705.04x = 187,082,989.72
  5. Step 5: Solve for x
    x = 187,082,989.72/15,705.04
  6. Step 6: Final answer
    x = 11,912.29

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