Home / 3,939.80-5,436.88-2,261.14

Finding the Fourth Proportional to 3,939.80, 5,436.88 and 2,261.14

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Solution

The fourth proportional to 3,939.80, 5,436.88 and 2,261.14 is: 3,120.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.80 : 5,436.88 = 2,261.14 : x
  2. Step 2: Convert to fraction form
    3,939.80/5,436.88 = 2,261.14/x
  3. Step 3: Cross multiply
    3,939.80x = 5,436.88 × 2,261.14
  4. Step 4: Simplify right side
    3,939.80x = 12,293,527.60
  5. Step 5: Solve for x
    x = 12,293,527.60/3,939.80
  6. Step 6: Final answer
    x = 3,120.35

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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.