Home / 3,929.41-5,422.58-2,161.01

Finding the Fourth Proportional to 3,929.41, 5,422.58 and 2,161.01

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Solution

The fourth proportional to 3,929.41, 5,422.58 and 2,161.01 is: 2,982.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.41 : 5,422.58 = 2,161.01 : x
  2. Step 2: Convert to fraction form
    3,929.41/5,422.58 = 2,161.01/x
  3. Step 3: Cross multiply
    3,929.41x = 5,422.58 × 2,161.01
  4. Step 4: Simplify right side
    3,929.41x = 11,718,260.46
  5. Step 5: Solve for x
    x = 11,718,260.46/3,929.41
  6. Step 6: Final answer
    x = 2,982.19

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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.