Home / 3,922.13-5,412.52-2,129.65

Finding the Fourth Proportional to 3,922.13, 5,412.52 and 2,129.65

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Solution

The fourth proportional to 3,922.13, 5,412.52 and 2,129.65 is: 2,938.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.13 : 5,412.52 = 2,129.65 : x
  2. Step 2: Convert to fraction form
    3,922.13/5,412.52 = 2,129.65/x
  3. Step 3: Cross multiply
    3,922.13x = 5,412.52 × 2,129.65
  4. Step 4: Simplify right side
    3,922.13x = 11,526,773.22
  5. Step 5: Solve for x
    x = 11,526,773.22/3,922.13
  6. Step 6: Final answer
    x = 2,938.91

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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.