Home / 2,800.21-3,864-1,621.03

Finding the Fourth Proportional to 2,800.21, 3,864 and 1,621.03

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Solution

The fourth proportional to 2,800.21, 3,864 and 1,621.03 is: 2,236.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.21 : 3,864 = 1,621.03 : x
  2. Step 2: Convert to fraction form
    2,800.21/3,864 = 1,621.03/x
  3. Step 3: Cross multiply
    2,800.21x = 3,864 × 1,621.03
  4. Step 4: Simplify right side
    2,800.21x = 6,263,659.92
  5. Step 5: Solve for x
    x = 6,263,659.92/2,800.21
  6. Step 6: Final answer
    x = 2,236.85

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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.