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Finding the Fourth Proportional to 12,109.74, 18,135.45 and 6,899.82

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Solution

The fourth proportional to 12,109.74, 18,135.45 and 6,899.82 is: 10,333.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.74 : 18,135.45 = 6,899.82 : x
  2. Step 2: Convert to fraction form
    12,109.74/18,135.45 = 6,899.82/x
  3. Step 3: Cross multiply
    12,109.74x = 18,135.45 × 6,899.82
  4. Step 4: Simplify right side
    12,109.74x = 125,131,340.62
  5. Step 5: Solve for x
    x = 125,131,340.62/12,109.74
  6. Step 6: Final answer
    x = 10,333.12

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