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Finding the Fourth Proportional to 31,485.96, 47,239.86 and 13,968.06

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Solution

The fourth proportional to 31,485.96, 47,239.86 and 13,968.06 is: 20,956.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,485.96 : 47,239.86 = 13,968.06 : x
  2. Step 2: Convert to fraction form
    31,485.96/47,239.86 = 13,968.06/x
  3. Step 3: Cross multiply
    31,485.96x = 47,239.86 × 13,968.06
  4. Step 4: Simplify right side
    31,485.96x = 659,849,198.87
  5. Step 5: Solve for x
    x = 659,849,198.87/31,485.96
  6. Step 6: Final answer
    x = 20,956.93

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