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Finding the Fourth Proportional to 15,675.91, 23,515.24 and 5,142.78

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Solution

The fourth proportional to 15,675.91, 23,515.24 and 5,142.78 is: 7,714.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,675.91 : 23,515.24 = 5,142.78 : x
  2. Step 2: Convert to fraction form
    15,675.91/23,515.24 = 5,142.78/x
  3. Step 3: Cross multiply
    15,675.91x = 23,515.24 × 5,142.78
  4. Step 4: Simplify right side
    15,675.91x = 120,933,705.97
  5. Step 5: Solve for x
    x = 120,933,705.97/15,675.91
  6. Step 6: Final answer
    x = 7,714.62

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