Home / 11,921.78-16,452.24-6,616.82

Finding the Fourth Proportional to 11,921.78, 16,452.24 and 6,616.82

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Solution

The fourth proportional to 11,921.78, 16,452.24 and 6,616.82 is: 9,131.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.78 : 16,452.24 = 6,616.82 : x
  2. Step 2: Convert to fraction form
    11,921.78/16,452.24 = 6,616.82/x
  3. Step 3: Cross multiply
    11,921.78x = 16,452.24 × 6,616.82
  4. Step 4: Simplify right side
    11,921.78x = 108,861,510.68
  5. Step 5: Solve for x
    x = 108,861,510.68/11,921.78
  6. Step 6: Final answer
    x = 9,131.31

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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.