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Finding the Fourth Proportional to 6,747.68, 9,311.83 and 3,915.61

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Solution

The fourth proportional to 6,747.68, 9,311.83 and 3,915.61 is: 5,403.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,747.68 : 9,311.83 = 3,915.61 : x
  2. Step 2: Convert to fraction form
    6,747.68/9,311.83 = 3,915.61/x
  3. Step 3: Cross multiply
    6,747.68x = 9,311.83 × 3,915.61
  4. Step 4: Simplify right side
    6,747.68x = 36,461,461.60
  5. Step 5: Solve for x
    x = 36,461,461.60/6,747.68
  6. Step 6: Final answer
    x = 5,403.55

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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.