Home / 3,981.58-5,972.40-1,382.70

Finding the Fourth Proportional to 3,981.58, 5,972.40 and 1,382.70

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Solution

The fourth proportional to 3,981.58, 5,972.40 and 1,382.70 is: 2,074.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.58 : 5,972.40 = 1,382.70 : x
  2. Step 2: Convert to fraction form
    3,981.58/5,972.40 = 1,382.70/x
  3. Step 3: Cross multiply
    3,981.58x = 5,972.40 × 1,382.70
  4. Step 4: Simplify right side
    3,981.58x = 8,258,037.48
  5. Step 5: Solve for x
    x = 8,258,037.48/3,981.58
  6. Step 6: Final answer
    x = 2,074.06

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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.