Home / 39,789.21-54,909.09-21,885.42

Finding the Fourth Proportional to 39,789.21, 54,909.09 and 21,885.42

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Solution

The fourth proportional to 39,789.21, 54,909.09 and 21,885.42 is: 30,201.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,789.21 : 54,909.09 = 21,885.42 : x
  2. Step 2: Convert to fraction form
    39,789.21/54,909.09 = 21,885.42/x
  3. Step 3: Cross multiply
    39,789.21x = 54,909.09 × 21,885.42
  4. Step 4: Simplify right side
    39,789.21x = 1,201,708,496.47
  5. Step 5: Solve for x
    x = 1,201,708,496.47/39,789.21
  6. Step 6: Final answer
    x = 30,201.87

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