Home / 2,141.87-3,213.14-1,321.03

Finding the Fourth Proportional to 2,141.87, 3,213.14 and 1,321.03

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Solution

The fourth proportional to 2,141.87, 3,213.14 and 1,321.03 is: 1,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.87 : 3,213.14 = 1,321.03 : x
  2. Step 2: Convert to fraction form
    2,141.87/3,213.14 = 1,321.03/x
  3. Step 3: Cross multiply
    2,141.87x = 3,213.14 × 1,321.03
  4. Step 4: Simplify right side
    2,141.87x = 4,244,639.70
  5. Step 5: Solve for x
    x = 4,244,639.70/2,141.87
  6. Step 6: Final answer
    x = 1,981.74

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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.