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Finding the Fourth Proportional to 8,829.84, 13,247.07 and 5,128.89

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Solution

The fourth proportional to 8,829.84, 13,247.07 and 5,128.89 is: 7,694.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,829.84 : 13,247.07 = 5,128.89 : x
  2. Step 2: Convert to fraction form
    8,829.84/13,247.07 = 5,128.89/x
  3. Step 3: Cross multiply
    8,829.84x = 13,247.07 × 5,128.89
  4. Step 4: Simplify right side
    8,829.84x = 67,942,764.85
  5. Step 5: Solve for x
    x = 67,942,764.85/8,829.84
  6. Step 6: Final answer
    x = 7,694.68

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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.