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Finding the Fourth Proportional to 7,681.56, 11,512.86 and 3,981.66

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Solution

The fourth proportional to 7,681.56, 11,512.86 and 3,981.66 is: 5,967.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.56 : 11,512.86 = 3,981.66 : x
  2. Step 2: Convert to fraction form
    7,681.56/11,512.86 = 3,981.66/x
  3. Step 3: Cross multiply
    7,681.56x = 11,512.86 × 3,981.66
  4. Step 4: Simplify right side
    7,681.56x = 45,840,294.15
  5. Step 5: Solve for x
    x = 45,840,294.15/7,681.56
  6. Step 6: Final answer
    x = 5,967.58

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