Home / 7,972.52-11,958.78-2,128.82

Finding the Fourth Proportional to 7,972.52, 11,958.78 and 2,128.82

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Solution

The fourth proportional to 7,972.52, 11,958.78 and 2,128.82 is: 3,193.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.52 : 11,958.78 = 2,128.82 : x
  2. Step 2: Convert to fraction form
    7,972.52/11,958.78 = 2,128.82/x
  3. Step 3: Cross multiply
    7,972.52x = 11,958.78 × 2,128.82
  4. Step 4: Simplify right side
    7,972.52x = 25,458,090.04
  5. Step 5: Solve for x
    x = 25,458,090.04/7,972.52
  6. Step 6: Final answer
    x = 3,193.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.