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Finding the Fourth Proportional to 13,812.62, 20,718.90 and 3,424.37

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Solution

The fourth proportional to 13,812.62, 20,718.90 and 3,424.37 is: 5,136.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.62 : 20,718.90 = 3,424.37 : x
  2. Step 2: Convert to fraction form
    13,812.62/20,718.90 = 3,424.37/x
  3. Step 3: Cross multiply
    13,812.62x = 20,718.90 × 3,424.37
  4. Step 4: Simplify right side
    13,812.62x = 70,949,076.00
  5. Step 5: Solve for x
    x = 70,949,076.00/13,812.62
  6. Step 6: Final answer
    x = 5,136.54

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