Home / 3,861.12-5,785.20-3,090

Finding the Fourth Proportional to 3,861.12, 5,785.20 and 3,090

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Solution

The fourth proportional to 3,861.12, 5,785.20 and 3,090 is: 4,629.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.12 : 5,785.20 = 3,090 : x
  2. Step 2: Convert to fraction form
    3,861.12/5,785.20 = 3,090/x
  3. Step 3: Cross multiply
    3,861.12x = 5,785.20 × 3,090
  4. Step 4: Simplify right side
    3,861.12x = 17,876,268
  5. Step 5: Solve for x
    x = 17,876,268/3,861.12
  6. Step 6: Final answer
    x = 4,629.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.