Home / 5,638.62-7,781.41-3,120.94

Finding the Fourth Proportional to 5,638.62, 7,781.41 and 3,120.94

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Solution

The fourth proportional to 5,638.62, 7,781.41 and 3,120.94 is: 4,306.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.62 : 7,781.41 = 3,120.94 : x
  2. Step 2: Convert to fraction form
    5,638.62/7,781.41 = 3,120.94/x
  3. Step 3: Cross multiply
    5,638.62x = 7,781.41 × 3,120.94
  4. Step 4: Simplify right side
    5,638.62x = 24,285,313.73
  5. Step 5: Solve for x
    x = 24,285,313.73/5,638.62
  6. Step 6: Final answer
    x = 4,306.96

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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.