Home / 3,811.80-5,721.32-1,964.19

Finding the Fourth Proportional to 3,811.80, 5,721.32 and 1,964.19

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Solution

The fourth proportional to 3,811.80, 5,721.32 and 1,964.19 is: 2,948.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.80 : 5,721.32 = 1,964.19 : x
  2. Step 2: Convert to fraction form
    3,811.80/5,721.32 = 1,964.19/x
  3. Step 3: Cross multiply
    3,811.80x = 5,721.32 × 1,964.19
  4. Step 4: Simplify right side
    3,811.80x = 11,237,759.53
  5. Step 5: Solve for x
    x = 11,237,759.53/3,811.80
  6. Step 6: Final answer
    x = 2,948.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.