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Finding the Fourth Proportional to 39,970.70, 59,951.78 and 21,230.84

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Solution

The fourth proportional to 39,970.70, 59,951.78 and 21,230.84 is: 31,843.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,970.70 : 59,951.78 = 21,230.84 : x
  2. Step 2: Convert to fraction form
    39,970.70/59,951.78 = 21,230.84/x
  3. Step 3: Cross multiply
    39,970.70x = 59,951.78 × 21,230.84
  4. Step 4: Simplify right side
    39,970.70x = 1,272,826,242.98
  5. Step 5: Solve for x
    x = 1,272,826,242.98/39,970.70
  6. Step 6: Final answer
    x = 31,843.99

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