Home / 3,845.21-5,765.76-1,991.73

Finding the Fourth Proportional to 3,845.21, 5,765.76 and 1,991.73

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Solution

The fourth proportional to 3,845.21, 5,765.76 and 1,991.73 is: 2,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,845.21 : 5,765.76 = 1,991.73 : x
  2. Step 2: Convert to fraction form
    3,845.21/5,765.76 = 1,991.73/x
  3. Step 3: Cross multiply
    3,845.21x = 5,765.76 × 1,991.73
  4. Step 4: Simplify right side
    3,845.21x = 11,483,819.28
  5. Step 5: Solve for x
    x = 11,483,819.28/3,845.21
  6. Step 6: Final answer
    x = 2,986.53

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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.