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Finding the Fourth Proportional to 7,971.69, 11,956.73 and 2,128.89

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Solution

The fourth proportional to 7,971.69, 11,956.73 and 2,128.89 is: 3,193.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,971.69 : 11,956.73 = 2,128.89 : x
  2. Step 2: Convert to fraction form
    7,971.69/11,956.73 = 2,128.89/x
  3. Step 3: Cross multiply
    7,971.69x = 11,956.73 × 2,128.89
  4. Step 4: Simplify right side
    7,971.69x = 25,454,552.29
  5. Step 5: Solve for x
    x = 25,454,552.29/7,971.69
  6. Step 6: Final answer
    x = 3,193.12

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