Home / 5,921.28-8,161.92-3,820.80

Finding the Fourth Proportional to 5,921.28, 8,161.92 and 3,820.80

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Solution

The fourth proportional to 5,921.28, 8,161.92 and 3,820.80 is: 5,266.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,921.28 : 8,161.92 = 3,820.80 : x
  2. Step 2: Convert to fraction form
    5,921.28/8,161.92 = 3,820.80/x
  3. Step 3: Cross multiply
    5,921.28x = 8,161.92 × 3,820.80
  4. Step 4: Simplify right side
    5,921.28x = 31,185,063.94
  5. Step 5: Solve for x
    x = 31,185,063.94/5,921.28
  6. Step 6: Final answer
    x = 5,266.61

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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.