Home / 3,791.21-5,231.86-2,112.64

Finding the Fourth Proportional to 3,791.21, 5,231.86 and 2,112.64

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Solution

The fourth proportional to 3,791.21, 5,231.86 and 2,112.64 is: 2,915.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,791.21 : 5,231.86 = 2,112.64 : x
  2. Step 2: Convert to fraction form
    3,791.21/5,231.86 = 2,112.64/x
  3. Step 3: Cross multiply
    3,791.21x = 5,231.86 × 2,112.64
  4. Step 4: Simplify right side
    3,791.21x = 11,053,036.71
  5. Step 5: Solve for x
    x = 11,053,036.71/3,791.21
  6. Step 6: Final answer
    x = 2,915.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.