Home / 3,894.20-5,373.91-2,125.80

Finding the Fourth Proportional to 3,894.20, 5,373.91 and 2,125.80

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Solution

The fourth proportional to 3,894.20, 5,373.91 and 2,125.80 is: 2,933.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.20 : 5,373.91 = 2,125.80 : x
  2. Step 2: Convert to fraction form
    3,894.20/5,373.91 = 2,125.80/x
  3. Step 3: Cross multiply
    3,894.20x = 5,373.91 × 2,125.80
  4. Step 4: Simplify right side
    3,894.20x = 11,423,857.88
  5. Step 5: Solve for x
    x = 11,423,857.88/3,894.20
  6. Step 6: Final answer
    x = 2,933.56

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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.