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Finding the Fourth Proportional to 21,661.94, 32,418.98 and 18,155.90

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Solution

The fourth proportional to 21,661.94, 32,418.98 and 18,155.90 is: 27,171.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.94 : 32,418.98 = 18,155.90 : x
  2. Step 2: Convert to fraction form
    21,661.94/32,418.98 = 18,155.90/x
  3. Step 3: Cross multiply
    21,661.94x = 32,418.98 × 18,155.90
  4. Step 4: Simplify right side
    21,661.94x = 588,595,749.25
  5. Step 5: Solve for x
    x = 588,595,749.25/21,661.94
  6. Step 6: Final answer
    x = 27,171.89

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