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Finding the Fourth Proportional to 29,640.74, 40,905.41 and 16,212.56

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Solution

The fourth proportional to 29,640.74, 40,905.41 and 16,212.56 is: 22,373.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,640.74 : 40,905.41 = 16,212.56 : x
  2. Step 2: Convert to fraction form
    29,640.74/40,905.41 = 16,212.56/x
  3. Step 3: Cross multiply
    29,640.74x = 40,905.41 × 16,212.56
  4. Step 4: Simplify right side
    29,640.74x = 663,181,128.36
  5. Step 5: Solve for x
    x = 663,181,128.36/29,640.74
  6. Step 6: Final answer
    x = 22,373.98

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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.