Home / 2,812.21-4,213.94-1,639.32

Finding the Fourth Proportional to 2,812.21, 4,213.94 and 1,639.32

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Solution

The fourth proportional to 2,812.21, 4,213.94 and 1,639.32 is: 2,456.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.21 : 4,213.94 = 1,639.32 : x
  2. Step 2: Convert to fraction form
    2,812.21/4,213.94 = 1,639.32/x
  3. Step 3: Cross multiply
    2,812.21x = 4,213.94 × 1,639.32
  4. Step 4: Simplify right side
    2,812.21x = 6,907,996.12
  5. Step 5: Solve for x
    x = 6,907,996.12/2,812.21
  6. Step 6: Final answer
    x = 2,456.43

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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.