Home / 11,921.25-16,451.69-6,616.56

Finding the Fourth Proportional to 11,921.25, 16,451.69 and 6,616.56

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Solution

The fourth proportional to 11,921.25, 16,451.69 and 6,616.56 is: 9,131.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.25 : 16,451.69 = 6,616.56 : x
  2. Step 2: Convert to fraction form
    11,921.25/16,451.69 = 6,616.56/x
  3. Step 3: Cross multiply
    11,921.25x = 16,451.69 × 6,616.56
  4. Step 4: Simplify right side
    11,921.25x = 108,853,560.90
  5. Step 5: Solve for x
    x = 108,853,560.90/11,921.25
  6. Step 6: Final answer
    x = 9,131.05

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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.