Home / 3,939.82-5,436.44-2,261.30

Finding the Fourth Proportional to 3,939.82, 5,436.44 and 2,261.30

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Solution

The fourth proportional to 3,939.82, 5,436.44 and 2,261.30 is: 3,120.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.82 : 5,436.44 = 2,261.30 : x
  2. Step 2: Convert to fraction form
    3,939.82/5,436.44 = 2,261.30/x
  3. Step 3: Cross multiply
    3,939.82x = 5,436.44 × 2,261.30
  4. Step 4: Simplify right side
    3,939.82x = 12,293,421.77
  5. Step 5: Solve for x
    x = 12,293,421.77/3,939.82
  6. Step 6: Final answer
    x = 3,120.30

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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.