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Finding the Fourth Proportional to 6,872.80, 10,309.20 and 3,410.32

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Solution

The fourth proportional to 6,872.80, 10,309.20 and 3,410.32 is: 5,115.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,872.80 : 10,309.20 = 3,410.32 : x
  2. Step 2: Convert to fraction form
    6,872.80/10,309.20 = 3,410.32/x
  3. Step 3: Cross multiply
    6,872.80x = 10,309.20 × 3,410.32
  4. Step 4: Simplify right side
    6,872.80x = 35,157,670.94
  5. Step 5: Solve for x
    x = 35,157,670.94/6,872.80
  6. Step 6: Final answer
    x = 5,115.48

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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.