Home / 3,930.74-5,424.35-2,162.31

Finding the Fourth Proportional to 3,930.74, 5,424.35 and 2,162.31

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Solution

The fourth proportional to 3,930.74, 5,424.35 and 2,162.31 is: 2,983.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.74 : 5,424.35 = 2,162.31 : x
  2. Step 2: Convert to fraction form
    3,930.74/5,424.35 = 2,162.31/x
  3. Step 3: Cross multiply
    3,930.74x = 5,424.35 × 2,162.31
  4. Step 4: Simplify right side
    3,930.74x = 11,729,137.77
  5. Step 5: Solve for x
    x = 11,729,137.77/3,930.74
  6. Step 6: Final answer
    x = 2,983.95

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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.