Home / 5,629.12-7,767.84-3,111.52

Finding the Fourth Proportional to 5,629.12, 7,767.84 and 3,111.52

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Solution

The fourth proportional to 5,629.12, 7,767.84 and 3,111.52 is: 4,293.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,629.12 : 7,767.84 = 3,111.52 : x
  2. Step 2: Convert to fraction form
    5,629.12/7,767.84 = 3,111.52/x
  3. Step 3: Cross multiply
    5,629.12x = 7,767.84 × 3,111.52
  4. Step 4: Simplify right side
    5,629.12x = 24,169,789.52
  5. Step 5: Solve for x
    x = 24,169,789.52/5,629.12
  6. Step 6: Final answer
    x = 4,293.71

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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.