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Finding the Fourth Proportional to 7,831.49, 10,807.95 and 5,174.24

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Solution

The fourth proportional to 7,831.49, 10,807.95 and 5,174.24 is: 7,140.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,831.49 : 10,807.95 = 5,174.24 : x
  2. Step 2: Convert to fraction form
    7,831.49/10,807.95 = 5,174.24/x
  3. Step 3: Cross multiply
    7,831.49x = 10,807.95 × 5,174.24
  4. Step 4: Simplify right side
    7,831.49x = 55,922,927.21
  5. Step 5: Solve for x
    x = 55,922,927.21/7,831.49
  6. Step 6: Final answer
    x = 7,140.78

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