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Finding the Fourth Proportional to 7,861.21, 10,843.73 and 4,836.85

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Solution

The fourth proportional to 7,861.21, 10,843.73 and 4,836.85 is: 6,671.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.21 : 10,843.73 = 4,836.85 : x
  2. Step 2: Convert to fraction form
    7,861.21/10,843.73 = 4,836.85/x
  3. Step 3: Cross multiply
    7,861.21x = 10,843.73 × 4,836.85
  4. Step 4: Simplify right side
    7,861.21x = 52,449,495.45
  5. Step 5: Solve for x
    x = 52,449,495.45/7,861.21
  6. Step 6: Final answer
    x = 6,671.94

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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.