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Finding the Fourth Proportional to 8,440.16, 12,643.97 and 4,731.12

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Solution

The fourth proportional to 8,440.16, 12,643.97 and 4,731.12 is: 7,087.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,440.16 : 12,643.97 = 4,731.12 : x
  2. Step 2: Convert to fraction form
    8,440.16/12,643.97 = 4,731.12/x
  3. Step 3: Cross multiply
    8,440.16x = 12,643.97 × 4,731.12
  4. Step 4: Simplify right side
    8,440.16x = 59,820,115.69
  5. Step 5: Solve for x
    x = 59,820,115.69/8,440.16
  6. Step 6: Final answer
    x = 7,087.56

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