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Finding the Fourth Proportional to 8,949.21, 12,351.04 and 5,412.44

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Solution

The fourth proportional to 8,949.21, 12,351.04 and 5,412.44 is: 7,469.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,949.21 : 12,351.04 = 5,412.44 : x
  2. Step 2: Convert to fraction form
    8,949.21/12,351.04 = 5,412.44/x
  3. Step 3: Cross multiply
    8,949.21x = 12,351.04 × 5,412.44
  4. Step 4: Simplify right side
    8,949.21x = 66,849,262.94
  5. Step 5: Solve for x
    x = 66,849,262.94/8,949.21
  6. Step 6: Final answer
    x = 7,469.85

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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.