Home / 3,120.16-4,305.14-1,861.68

Finding the Fourth Proportional to 3,120.16, 4,305.14 and 1,861.68

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Solution

The fourth proportional to 3,120.16, 4,305.14 and 1,861.68 is: 2,568.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.16 : 4,305.14 = 1,861.68 : x
  2. Step 2: Convert to fraction form
    3,120.16/4,305.14 = 1,861.68/x
  3. Step 3: Cross multiply
    3,120.16x = 4,305.14 × 1,861.68
  4. Step 4: Simplify right side
    3,120.16x = 8,014,793.04
  5. Step 5: Solve for x
    x = 8,014,793.04/3,120.16
  6. Step 6: Final answer
    x = 2,568.71

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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.