Home / 3,129.82-4,321.20-2,541.76

Finding the Fourth Proportional to 3,129.82, 4,321.20 and 2,541.76

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Solution

The fourth proportional to 3,129.82, 4,321.20 and 2,541.76 is: 3,509.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.82 : 4,321.20 = 2,541.76 : x
  2. Step 2: Convert to fraction form
    3,129.82/4,321.20 = 2,541.76/x
  3. Step 3: Cross multiply
    3,129.82x = 4,321.20 × 2,541.76
  4. Step 4: Simplify right side
    3,129.82x = 10,983,453.31
  5. Step 5: Solve for x
    x = 10,983,453.31/3,129.82
  6. Step 6: Final answer
    x = 3,509.29

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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.