Home / 3,929.52-5,422.62-2,136.90

Finding the Fourth Proportional to 3,929.52, 5,422.62 and 2,136.90

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Solution

The fourth proportional to 3,929.52, 5,422.62 and 2,136.90 is: 2,948.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.52 : 5,422.62 = 2,136.90 : x
  2. Step 2: Convert to fraction form
    3,929.52/5,422.62 = 2,136.90/x
  3. Step 3: Cross multiply
    3,929.52x = 5,422.62 × 2,136.90
  4. Step 4: Simplify right side
    3,929.52x = 11,587,596.68
  5. Step 5: Solve for x
    x = 11,587,596.68/3,929.52
  6. Step 6: Final answer
    x = 2,948.86

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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.