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Finding the Fourth Proportional to 43,405.09, 65,005.54 and 21,148.72

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Solution

The fourth proportional to 43,405.09, 65,005.54 and 21,148.72 is: 31,673.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,405.09 : 65,005.54 = 21,148.72 : x
  2. Step 2: Convert to fraction form
    43,405.09/65,005.54 = 21,148.72/x
  3. Step 3: Cross multiply
    43,405.09x = 65,005.54 × 21,148.72
  4. Step 4: Simplify right side
    43,405.09x = 1,374,783,963.91
  5. Step 5: Solve for x
    x = 1,374,783,963.91/43,405.09
  6. Step 6: Final answer
    x = 31,673.34

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