Home / 7,974.78-11,962.53-2,781.06

Finding the Fourth Proportional to 7,974.78, 11,962.53 and 2,781.06

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Solution

The fourth proportional to 7,974.78, 11,962.53 and 2,781.06 is: 4,171.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,974.78 : 11,962.53 = 2,781.06 : x
  2. Step 2: Convert to fraction form
    7,974.78/11,962.53 = 2,781.06/x
  3. Step 3: Cross multiply
    7,974.78x = 11,962.53 × 2,781.06
  4. Step 4: Simplify right side
    7,974.78x = 33,268,513.68
  5. Step 5: Solve for x
    x = 33,268,513.68/7,974.78
  6. Step 6: Final answer
    x = 4,171.72

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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.