Home / 3,923.92-5,415.01-2,155.53

Finding the Fourth Proportional to 3,923.92, 5,415.01 and 2,155.53

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Solution

The fourth proportional to 3,923.92, 5,415.01 and 2,155.53 is: 2,974.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.92 : 5,415.01 = 2,155.53 : x
  2. Step 2: Convert to fraction form
    3,923.92/5,415.01 = 2,155.53/x
  3. Step 3: Cross multiply
    3,923.92x = 5,415.01 × 2,155.53
  4. Step 4: Simplify right side
    3,923.92x = 11,672,213.09
  5. Step 5: Solve for x
    x = 11,672,213.09/3,923.92
  6. Step 6: Final answer
    x = 2,974.63

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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.