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Finding the Fourth Proportional to 6,978, 10,471.80 and 2,874

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Solution

The fourth proportional to 6,978, 10,471.80 and 2,874 is: 4,312.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978 : 10,471.80 = 2,874 : x
  2. Step 2: Convert to fraction form
    6,978/10,471.80 = 2,874/x
  3. Step 3: Cross multiply
    6,978x = 10,471.80 × 2,874
  4. Step 4: Simplify right side
    6,978x = 30,095,953.20
  5. Step 5: Solve for x
    x = 30,095,953.20/6,978
  6. Step 6: Final answer
    x = 4,312.98

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