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Finding the Fourth Proportional to 8,205.92, 12,249.76 and 7,622.72

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Solution

The fourth proportional to 8,205.92, 12,249.76 and 7,622.72 is: 11,379.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,205.92 : 12,249.76 = 7,622.72 : x
  2. Step 2: Convert to fraction form
    8,205.92/12,249.76 = 7,622.72/x
  3. Step 3: Cross multiply
    8,205.92x = 12,249.76 × 7,622.72
  4. Step 4: Simplify right side
    8,205.92x = 93,376,490.55
  5. Step 5: Solve for x
    x = 93,376,490.55/8,205.92
  6. Step 6: Final answer
    x = 11,379.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.