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Finding the Fourth Proportional to 28,871.25, 39,842.45 and 15,623.25

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Solution

The fourth proportional to 28,871.25, 39,842.45 and 15,623.25 is: 21,560.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.25 : 39,842.45 = 15,623.25 : x
  2. Step 2: Convert to fraction form
    28,871.25/39,842.45 = 15,623.25/x
  3. Step 3: Cross multiply
    28,871.25x = 39,842.45 × 15,623.25
  4. Step 4: Simplify right side
    28,871.25x = 622,468,478.85
  5. Step 5: Solve for x
    x = 622,468,478.85/28,871.25
  6. Step 6: Final answer
    x = 21,560.15

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