Home / 3,790.80-5,231.39-2,112.32

Finding the Fourth Proportional to 3,790.80, 5,231.39 and 2,112.32

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Solution

The fourth proportional to 3,790.80, 5,231.39 and 2,112.32 is: 2,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,790.80 : 5,231.39 = 2,112.32 : x
  2. Step 2: Convert to fraction form
    3,790.80/5,231.39 = 2,112.32/x
  3. Step 3: Cross multiply
    3,790.80x = 5,231.39 × 2,112.32
  4. Step 4: Simplify right side
    3,790.80x = 11,050,369.72
  5. Step 5: Solve for x
    x = 11,050,369.72/3,790.80
  6. Step 6: Final answer
    x = 2,915.05

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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.