Home / 6,121.78-8,436.22-4,128.88

Finding the Fourth Proportional to 6,121.78, 8,436.22 and 4,128.88

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Solution

The fourth proportional to 6,121.78, 8,436.22 and 4,128.88 is: 5,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.78 : 8,436.22 = 4,128.88 : x
  2. Step 2: Convert to fraction form
    6,121.78/8,436.22 = 4,128.88/x
  3. Step 3: Cross multiply
    6,121.78x = 8,436.22 × 4,128.88
  4. Step 4: Simplify right side
    6,121.78x = 34,832,124.44
  5. Step 5: Solve for x
    x = 34,832,124.44/6,121.78
  6. Step 6: Final answer
    x = 5,689.87

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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.