Home / 3,929.32-5,422.46-2,160.92

Finding the Fourth Proportional to 3,929.32, 5,422.46 and 2,160.92

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Solution

The fourth proportional to 3,929.32, 5,422.46 and 2,160.92 is: 2,982.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.32 : 5,422.46 = 2,160.92 : x
  2. Step 2: Convert to fraction form
    3,929.32/5,422.46 = 2,160.92/x
  3. Step 3: Cross multiply
    3,929.32x = 5,422.46 × 2,160.92
  4. Step 4: Simplify right side
    3,929.32x = 11,717,502.26
  5. Step 5: Solve for x
    x = 11,717,502.26/3,929.32
  6. Step 6: Final answer
    x = 2,982.07

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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.