Home / 6,121.60-8,435.96-4,128.69

Finding the Fourth Proportional to 6,121.60, 8,435.96 and 4,128.69

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Solution

The fourth proportional to 6,121.60, 8,435.96 and 4,128.69 is: 5,689.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.60 : 8,435.96 = 4,128.69 : x
  2. Step 2: Convert to fraction form
    6,121.60/8,435.96 = 4,128.69/x
  3. Step 3: Cross multiply
    6,121.60x = 8,435.96 × 4,128.69
  4. Step 4: Simplify right side
    6,121.60x = 34,829,474.46
  5. Step 5: Solve for x
    x = 34,829,474.46/6,121.60
  6. Step 6: Final answer
    x = 5,689.61

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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.