Home / 4,120.16-5,685.80-2,231.75

Finding the Fourth Proportional to 4,120.16, 5,685.80 and 2,231.75

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Solution

The fourth proportional to 4,120.16, 5,685.80 and 2,231.75 is: 3,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,120.16 : 5,685.80 = 2,231.75 : x
  2. Step 2: Convert to fraction form
    4,120.16/5,685.80 = 2,231.75/x
  3. Step 3: Cross multiply
    4,120.16x = 5,685.80 × 2,231.75
  4. Step 4: Simplify right side
    4,120.16x = 12,689,244.56
  5. Step 5: Solve for x
    x = 12,689,244.56/4,120.16
  6. Step 6: Final answer
    x = 3,079.80

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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.