Home / 3,921.61-5,411.92-2,219.99

Finding the Fourth Proportional to 3,921.61, 5,411.92 and 2,219.99

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Solution

The fourth proportional to 3,921.61, 5,411.92 and 2,219.99 is: 3,063.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.61 : 5,411.92 = 2,219.99 : x
  2. Step 2: Convert to fraction form
    3,921.61/5,411.92 = 2,219.99/x
  3. Step 3: Cross multiply
    3,921.61x = 5,411.92 × 2,219.99
  4. Step 4: Simplify right side
    3,921.61x = 12,014,381.22
  5. Step 5: Solve for x
    x = 12,014,381.22/3,921.61
  6. Step 6: Final answer
    x = 3,063.63

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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.