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Finding the Fourth Proportional to 21,488.36, 29,652.36 and 11,928.80

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Solution

The fourth proportional to 21,488.36, 29,652.36 and 11,928.80 is: 16,460.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.36 : 29,652.36 = 11,928.80 : x
  2. Step 2: Convert to fraction form
    21,488.36/29,652.36 = 11,928.80/x
  3. Step 3: Cross multiply
    21,488.36x = 29,652.36 × 11,928.80
  4. Step 4: Simplify right side
    21,488.36x = 353,717,071.97
  5. Step 5: Solve for x
    x = 353,717,071.97/21,488.36
  6. Step 6: Final answer
    x = 16,460.87

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