Home / 8,081.28-12,121.84-2,816.28

Finding the Fourth Proportional to 8,081.28, 12,121.84 and 2,816.28

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Solution

The fourth proportional to 8,081.28, 12,121.84 and 2,816.28 is: 4,224.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.28 : 12,121.84 = 2,816.28 : x
  2. Step 2: Convert to fraction form
    8,081.28/12,121.84 = 2,816.28/x
  3. Step 3: Cross multiply
    8,081.28x = 12,121.84 × 2,816.28
  4. Step 4: Simplify right side
    8,081.28x = 34,138,499.08
  5. Step 5: Solve for x
    x = 34,138,499.08/8,081.28
  6. Step 6: Final answer
    x = 4,224.39

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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.