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Finding the Fourth Proportional to 6,728.76, 9,285.12 and 3,895.56

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Solution

The fourth proportional to 6,728.76, 9,285.12 and 3,895.56 is: 5,375.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,728.76 : 9,285.12 = 3,895.56 : x
  2. Step 2: Convert to fraction form
    6,728.76/9,285.12 = 3,895.56/x
  3. Step 3: Cross multiply
    6,728.76x = 9,285.12 × 3,895.56
  4. Step 4: Simplify right side
    6,728.76x = 36,170,742.07
  5. Step 5: Solve for x
    x = 36,170,742.07/6,728.76
  6. Step 6: Final answer
    x = 5,375.54

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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.