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Finding the Fourth Proportional to 7,658.75, 11,489.11 and 2,728.89

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Solution

The fourth proportional to 7,658.75, 11,489.11 and 2,728.89 is: 4,093.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,658.75 : 11,489.11 = 2,728.89 : x
  2. Step 2: Convert to fraction form
    7,658.75/11,489.11 = 2,728.89/x
  3. Step 3: Cross multiply
    7,658.75x = 11,489.11 × 2,728.89
  4. Step 4: Simplify right side
    7,658.75x = 31,352,510.57
  5. Step 5: Solve for x
    x = 31,352,510.57/7,658.75
  6. Step 6: Final answer
    x = 4,093.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.