Home / 3,929.28-5,422.47-2,160.87

Finding the Fourth Proportional to 3,929.28, 5,422.47 and 2,160.87

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Solution

The fourth proportional to 3,929.28, 5,422.47 and 2,160.87 is: 2,982.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.28 : 5,422.47 = 2,160.87 : x
  2. Step 2: Convert to fraction form
    3,929.28/5,422.47 = 2,160.87/x
  3. Step 3: Cross multiply
    3,929.28x = 5,422.47 × 2,160.87
  4. Step 4: Simplify right side
    3,929.28x = 11,717,252.75
  5. Step 5: Solve for x
    x = 11,717,252.75/3,929.28
  6. Step 6: Final answer
    x = 2,982.04

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1.5x scale

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.