Home / 3,922.12-5,411.94-2,153.80

Finding the Fourth Proportional to 3,922.12, 5,411.94 and 2,153.80

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Solution

The fourth proportional to 3,922.12, 5,411.94 and 2,153.80 is: 2,971.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.12 : 5,411.94 = 2,153.80 : x
  2. Step 2: Convert to fraction form
    3,922.12/5,411.94 = 2,153.80/x
  3. Step 3: Cross multiply
    3,922.12x = 5,411.94 × 2,153.80
  4. Step 4: Simplify right side
    3,922.12x = 11,656,236.37
  5. Step 5: Solve for x
    x = 11,656,236.37/3,922.12
  6. Step 6: Final answer
    x = 2,971.92

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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.