Home / 3,790.21-5,229.79-2,111.57

Finding the Fourth Proportional to 3,790.21, 5,229.79 and 2,111.57

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Solution

The fourth proportional to 3,790.21, 5,229.79 and 2,111.57 is: 2,913.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,790.21 : 5,229.79 = 2,111.57 : x
  2. Step 2: Convert to fraction form
    3,790.21/5,229.79 = 2,111.57/x
  3. Step 3: Cross multiply
    3,790.21x = 5,229.79 × 2,111.57
  4. Step 4: Simplify right side
    3,790.21x = 11,043,067.67
  5. Step 5: Solve for x
    x = 11,043,067.67/3,790.21
  6. Step 6: Final answer
    x = 2,913.58

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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.