Home / 3,939.62-5,436.65-2,261.21

Finding the Fourth Proportional to 3,939.62, 5,436.65 and 2,261.21

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Solution

The fourth proportional to 3,939.62, 5,436.65 and 2,261.21 is: 3,120.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.62 : 5,436.65 = 2,261.21 : x
  2. Step 2: Convert to fraction form
    3,939.62/5,436.65 = 2,261.21/x
  3. Step 3: Cross multiply
    3,939.62x = 5,436.65 × 2,261.21
  4. Step 4: Simplify right side
    3,939.62x = 12,293,385.82
  5. Step 5: Solve for x
    x = 12,293,385.82/3,939.62
  6. Step 6: Final answer
    x = 3,120.45

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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.