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Finding the Fourth Proportional to 31,495.04, 43,448.64 and 20,320.64

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Solution

The fourth proportional to 31,495.04, 43,448.64 and 20,320.64 is: 28,033.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,495.04 : 43,448.64 = 20,320.64 : x
  2. Step 2: Convert to fraction form
    31,495.04/43,448.64 = 20,320.64/x
  3. Step 3: Cross multiply
    31,495.04x = 43,448.64 × 20,320.64
  4. Step 4: Simplify right side
    31,495.04x = 882,904,171.93
  5. Step 5: Solve for x
    x = 882,904,171.93/31,495.04
  6. Step 6: Final answer
    x = 28,033.12

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