Home / 3,896.60-5,377.31-2,128.16

Finding the Fourth Proportional to 3,896.60, 5,377.31 and 2,128.16

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Solution

The fourth proportional to 3,896.60, 5,377.31 and 2,128.16 is: 2,936.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,896.60 : 5,377.31 = 2,128.16 : x
  2. Step 2: Convert to fraction form
    3,896.60/5,377.31 = 2,128.16/x
  3. Step 3: Cross multiply
    3,896.60x = 5,377.31 × 2,128.16
  4. Step 4: Simplify right side
    3,896.60x = 11,443,738.52
  5. Step 5: Solve for x
    x = 11,443,738.52/3,896.60
  6. Step 6: Final answer
    x = 2,936.86

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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.