Home / 3,889.06-5,366.89-2,120.66

Finding the Fourth Proportional to 3,889.06, 5,366.89 and 2,120.66

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Solution

The fourth proportional to 3,889.06, 5,366.89 and 2,120.66 is: 2,926.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.06 : 5,366.89 = 2,120.66 : x
  2. Step 2: Convert to fraction form
    3,889.06/5,366.89 = 2,120.66/x
  3. Step 3: Cross multiply
    3,889.06x = 5,366.89 × 2,120.66
  4. Step 4: Simplify right side
    3,889.06x = 11,381,348.95
  5. Step 5: Solve for x
    x = 11,381,348.95/3,889.06
  6. Step 6: Final answer
    x = 2,926.50

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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.