Home / 5,229.78-7,216.80-2,991.54

Finding the Fourth Proportional to 5,229.78, 7,216.80 and 2,991.54

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Solution

The fourth proportional to 5,229.78, 7,216.80 and 2,991.54 is: 4,128.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,229.78 : 7,216.80 = 2,991.54 : x
  2. Step 2: Convert to fraction form
    5,229.78/7,216.80 = 2,991.54/x
  3. Step 3: Cross multiply
    5,229.78x = 7,216.80 × 2,991.54
  4. Step 4: Simplify right side
    5,229.78x = 21,589,345.87
  5. Step 5: Solve for x
    x = 21,589,345.87/5,229.78
  6. Step 6: Final answer
    x = 4,128.16

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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.