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Finding the Fourth Proportional to 7,221.45, 9,951.86 and 4,979.27

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Solution

The fourth proportional to 7,221.45, 9,951.86 and 4,979.27 is: 6,861.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.45 : 9,951.86 = 4,979.27 : x
  2. Step 2: Convert to fraction form
    7,221.45/9,951.86 = 4,979.27/x
  3. Step 3: Cross multiply
    7,221.45x = 9,951.86 × 4,979.27
  4. Step 4: Simplify right side
    7,221.45x = 49,553,035.27
  5. Step 5: Solve for x
    x = 49,553,035.27/7,221.45
  6. Step 6: Final answer
    x = 6,861.92

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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.