Home / 3,138.05-4,330.61-1,721.85

Finding the Fourth Proportional to 3,138.05, 4,330.61 and 1,721.85

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Solution

The fourth proportional to 3,138.05, 4,330.61 and 1,721.85 is: 2,376.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.05 : 4,330.61 = 1,721.85 : x
  2. Step 2: Convert to fraction form
    3,138.05/4,330.61 = 1,721.85/x
  3. Step 3: Cross multiply
    3,138.05x = 4,330.61 × 1,721.85
  4. Step 4: Simplify right side
    3,138.05x = 7,456,667.35
  5. Step 5: Solve for x
    x = 7,456,667.35/3,138.05
  6. Step 6: Final answer
    x = 2,376.21

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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.