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Finding the Fourth Proportional to 8,744.37, 12,129.03 and 8,429.13

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Solution

The fourth proportional to 8,744.37, 12,129.03 and 8,429.13 is: 11,691.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,744.37 : 12,129.03 = 8,429.13 : x
  2. Step 2: Convert to fraction form
    8,744.37/12,129.03 = 8,429.13/x
  3. Step 3: Cross multiply
    8,744.37x = 12,129.03 × 8,429.13
  4. Step 4: Simplify right side
    8,744.37x = 102,237,170.64
  5. Step 5: Solve for x
    x = 102,237,170.64/8,744.37
  6. Step 6: Final answer
    x = 11,691.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.