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Finding the Fourth Proportional to 6,911.42, 10,368.91 and 1,981.42

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Solution

The fourth proportional to 6,911.42, 10,368.91 and 1,981.42 is: 2,972.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,911.42 : 10,368.91 = 1,981.42 : x
  2. Step 2: Convert to fraction form
    6,911.42/10,368.91 = 1,981.42/x
  3. Step 3: Cross multiply
    6,911.42x = 10,368.91 × 1,981.42
  4. Step 4: Simplify right side
    6,911.42x = 20,545,113.81
  5. Step 5: Solve for x
    x = 20,545,113.81/6,911.42
  6. Step 6: Final answer
    x = 2,972.63

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