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Finding the Fourth Proportional to 7,978.05, 11,008.44 and 4,621.17

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Solution

The fourth proportional to 7,978.05, 11,008.44 and 4,621.17 is: 6,376.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.05 : 11,008.44 = 4,621.17 : x
  2. Step 2: Convert to fraction form
    7,978.05/11,008.44 = 4,621.17/x
  3. Step 3: Cross multiply
    7,978.05x = 11,008.44 × 4,621.17
  4. Step 4: Simplify right side
    7,978.05x = 50,871,872.67
  5. Step 5: Solve for x
    x = 50,871,872.67/7,978.05
  6. Step 6: Final answer
    x = 6,376.48

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