Home / 3,620.82-5,431.77-1,281.12

Finding the Fourth Proportional to 3,620.82, 5,431.77 and 1,281.12

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Solution

The fourth proportional to 3,620.82, 5,431.77 and 1,281.12 is: 1,921.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.82 : 5,431.77 = 1,281.12 : x
  2. Step 2: Convert to fraction form
    3,620.82/5,431.77 = 1,281.12/x
  3. Step 3: Cross multiply
    3,620.82x = 5,431.77 × 1,281.12
  4. Step 4: Simplify right side
    3,620.82x = 6,958,749.18
  5. Step 5: Solve for x
    x = 6,958,749.18/3,620.82
  6. Step 6: Final answer
    x = 1,921.87

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1.5x scale

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.