Home / 3,899.92-5,381.99-2,131.60

Finding the Fourth Proportional to 3,899.92, 5,381.99 and 2,131.60

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Solution

The fourth proportional to 3,899.92, 5,381.99 and 2,131.60 is: 2,941.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.92 : 5,381.99 = 2,131.60 : x
  2. Step 2: Convert to fraction form
    3,899.92/5,381.99 = 2,131.60/x
  3. Step 3: Cross multiply
    3,899.92x = 5,381.99 × 2,131.60
  4. Step 4: Simplify right side
    3,899.92x = 11,472,249.88
  5. Step 5: Solve for x
    x = 11,472,249.88/3,899.92
  6. Step 6: Final answer
    x = 2,941.66

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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.