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Finding the Fourth Proportional to 12,613.12, 18,910.72 and 4,815.36

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Solution

The fourth proportional to 12,613.12, 18,910.72 and 4,815.36 is: 7,219.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.12 : 18,910.72 = 4,815.36 : x
  2. Step 2: Convert to fraction form
    12,613.12/18,910.72 = 4,815.36/x
  3. Step 3: Cross multiply
    12,613.12x = 18,910.72 × 4,815.36
  4. Step 4: Simplify right side
    12,613.12x = 91,061,924.66
  5. Step 5: Solve for x
    x = 91,061,924.66/12,613.12
  6. Step 6: Final answer
    x = 7,219.62

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