Home / 3,105.32-4,284.10-1,986

Finding the Fourth Proportional to 3,105.32, 4,284.10 and 1,986

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Solution

The fourth proportional to 3,105.32, 4,284.10 and 1,986 is: 2,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.32 : 4,284.10 = 1,986 : x
  2. Step 2: Convert to fraction form
    3,105.32/4,284.10 = 1,986/x
  3. Step 3: Cross multiply
    3,105.32x = 4,284.10 × 1,986
  4. Step 4: Simplify right side
    3,105.32x = 8,508,222.60
  5. Step 5: Solve for x
    x = 8,508,222.60/3,105.32
  6. Step 6: Final answer
    x = 2,739.89

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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.