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Finding the Fourth Proportional to 6,261.92, 8,642.88 and 3,903.61

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Solution

The fourth proportional to 6,261.92, 8,642.88 and 3,903.61 is: 5,387.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,261.92 : 8,642.88 = 3,903.61 : x
  2. Step 2: Convert to fraction form
    6,261.92/8,642.88 = 3,903.61/x
  3. Step 3: Cross multiply
    6,261.92x = 8,642.88 × 3,903.61
  4. Step 4: Simplify right side
    6,261.92x = 33,738,416.42
  5. Step 5: Solve for x
    x = 33,738,416.42/6,261.92
  6. Step 6: Final answer
    x = 5,387.87

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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.