Home / 3,900.98-5,380.89-2,721.62

Finding the Fourth Proportional to 3,900.98, 5,380.89 and 2,721.62

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Solution

The fourth proportional to 3,900.98, 5,380.89 and 2,721.62 is: 3,754.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.98 : 5,380.89 = 2,721.62 : x
  2. Step 2: Convert to fraction form
    3,900.98/5,380.89 = 2,721.62/x
  3. Step 3: Cross multiply
    3,900.98x = 5,380.89 × 2,721.62
  4. Step 4: Simplify right side
    3,900.98x = 14,644,737.84
  5. Step 5: Solve for x
    x = 14,644,737.84/3,900.98
  6. Step 6: Final answer
    x = 3,754.12

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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.