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Finding the Fourth Proportional to 21,022.54, 31,495.53 and 12,230.80

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Solution

The fourth proportional to 21,022.54, 31,495.53 and 12,230.80 is: 18,323.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.54 : 31,495.53 = 12,230.80 : x
  2. Step 2: Convert to fraction form
    21,022.54/31,495.53 = 12,230.80/x
  3. Step 3: Cross multiply
    21,022.54x = 31,495.53 × 12,230.80
  4. Step 4: Simplify right side
    21,022.54x = 385,215,495.45
  5. Step 5: Solve for x
    x = 385,215,495.45/21,022.54
  6. Step 6: Final answer
    x = 18,323.93

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