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Finding the Fourth Proportional to 8,213.42, 12,317.88 and 2,947.46

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Solution

The fourth proportional to 8,213.42, 12,317.88 and 2,947.46 is: 4,420.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,213.42 : 12,317.88 = 2,947.46 : x
  2. Step 2: Convert to fraction form
    8,213.42/12,317.88 = 2,947.46/x
  3. Step 3: Cross multiply
    8,213.42x = 12,317.88 × 2,947.46
  4. Step 4: Simplify right side
    8,213.42x = 36,306,458.58
  5. Step 5: Solve for x
    x = 36,306,458.58/8,213.42
  6. Step 6: Final answer
    x = 4,420.38

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