Home / 3,924.10-5,415.22-2,155.74

Finding the Fourth Proportional to 3,924.10, 5,415.22 and 2,155.74

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Solution

The fourth proportional to 3,924.10, 5,415.22 and 2,155.74 is: 2,974.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.10 : 5,415.22 = 2,155.74 : x
  2. Step 2: Convert to fraction form
    3,924.10/5,415.22 = 2,155.74/x
  3. Step 3: Cross multiply
    3,924.10x = 5,415.22 × 2,155.74
  4. Step 4: Simplify right side
    3,924.10x = 11,673,806.36
  5. Step 5: Solve for x
    x = 11,673,806.36/3,924.10
  6. Step 6: Final answer
    x = 2,974.90

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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.