Home / 3,857.45-5,323.31-2,155.96

Finding the Fourth Proportional to 3,857.45, 5,323.31 and 2,155.96

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Solution

The fourth proportional to 3,857.45, 5,323.31 and 2,155.96 is: 2,975.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.45 : 5,323.31 = 2,155.96 : x
  2. Step 2: Convert to fraction form
    3,857.45/5,323.31 = 2,155.96/x
  3. Step 3: Cross multiply
    3,857.45x = 5,323.31 × 2,155.96
  4. Step 4: Simplify right side
    3,857.45x = 11,476,843.43
  5. Step 5: Solve for x
    x = 11,476,843.43/3,857.45
  6. Step 6: Final answer
    x = 2,975.24

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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.