Home / 3,939.84-5,436.98-2,171.44

Finding the Fourth Proportional to 3,939.84, 5,436.98 and 2,171.44

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Solution

The fourth proportional to 3,939.84, 5,436.98 and 2,171.44 is: 2,996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.84 : 5,436.98 = 2,171.44 : x
  2. Step 2: Convert to fraction form
    3,939.84/5,436.98 = 2,171.44/x
  3. Step 3: Cross multiply
    3,939.84x = 5,436.98 × 2,171.44
  4. Step 4: Simplify right side
    3,939.84x = 11,806,075.85
  5. Step 5: Solve for x
    x = 11,806,075.85/3,939.84
  6. Step 6: Final answer
    x = 2,996.59

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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.