Home / 3,929.28-5,422.36-2,136.73

Finding the Fourth Proportional to 3,929.28, 5,422.36 and 2,136.73

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Solution

The fourth proportional to 3,929.28, 5,422.36 and 2,136.73 is: 2,948.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.28 : 5,422.36 = 2,136.73 : x
  2. Step 2: Convert to fraction form
    3,929.28/5,422.36 = 2,136.73/x
  3. Step 3: Cross multiply
    3,929.28x = 5,422.36 × 2,136.73
  4. Step 4: Simplify right side
    3,929.28x = 11,586,114.56
  5. Step 5: Solve for x
    x = 11,586,114.56/3,929.28
  6. Step 6: Final answer
    x = 2,948.66

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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.