Home / 3,922.28-5,412.73-2,153.90

Finding the Fourth Proportional to 3,922.28, 5,412.73 and 2,153.90

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Solution

The fourth proportional to 3,922.28, 5,412.73 and 2,153.90 is: 2,972.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.28 : 5,412.73 = 2,153.90 : x
  2. Step 2: Convert to fraction form
    3,922.28/5,412.73 = 2,153.90/x
  3. Step 3: Cross multiply
    3,922.28x = 5,412.73 × 2,153.90
  4. Step 4: Simplify right side
    3,922.28x = 11,658,479.15
  5. Step 5: Solve for x
    x = 11,658,479.15/3,922.28
  6. Step 6: Final answer
    x = 2,972.37

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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.