Home / 3,889.03-5,366.85-2,120.73

Finding the Fourth Proportional to 3,889.03, 5,366.85 and 2,120.73

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Solution

The fourth proportional to 3,889.03, 5,366.85 and 2,120.73 is: 2,926.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.03 : 5,366.85 = 2,120.73 : x
  2. Step 2: Convert to fraction form
    3,889.03/5,366.85 = 2,120.73/x
  3. Step 3: Cross multiply
    3,889.03x = 5,366.85 × 2,120.73
  4. Step 4: Simplify right side
    3,889.03x = 11,381,639.80
  5. Step 5: Solve for x
    x = 11,381,639.80/3,889.03
  6. Step 6: Final answer
    x = 2,926.60

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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.