Home / 8,118.52-12,177.78-2,921.56

Finding the Fourth Proportional to 8,118.52, 12,177.78 and 2,921.56

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Solution

The fourth proportional to 8,118.52, 12,177.78 and 2,921.56 is: 4,382.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.52 : 12,177.78 = 2,921.56 : x
  2. Step 2: Convert to fraction form
    8,118.52/12,177.78 = 2,921.56/x
  3. Step 3: Cross multiply
    8,118.52x = 12,177.78 × 2,921.56
  4. Step 4: Simplify right side
    8,118.52x = 35,578,114.94
  5. Step 5: Solve for x
    x = 35,578,114.94/8,118.52
  6. Step 6: Final answer
    x = 4,382.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.