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Finding the Fourth Proportional to 7,217.92, 9,961.32 and 4,074.67

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Solution

The fourth proportional to 7,217.92, 9,961.32 and 4,074.67 is: 5,623.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,217.92 : 9,961.32 = 4,074.67 : x
  2. Step 2: Convert to fraction form
    7,217.92/9,961.32 = 4,074.67/x
  3. Step 3: Cross multiply
    7,217.92x = 9,961.32 × 4,074.67
  4. Step 4: Simplify right side
    7,217.92x = 40,589,091.76
  5. Step 5: Solve for x
    x = 40,589,091.76/7,217.92
  6. Step 6: Final answer
    x = 5,623.38

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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.