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Finding the Fourth Proportional to 36,543, 50,429.40 and 21,639

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Solution

The fourth proportional to 36,543, 50,429.40 and 21,639 is: 29,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,543 : 50,429.40 = 21,639 : x
  2. Step 2: Convert to fraction form
    36,543/50,429.40 = 21,639/x
  3. Step 3: Cross multiply
    36,543x = 50,429.40 × 21,639
  4. Step 4: Simplify right side
    36,543x = 1,091,241,786.60
  5. Step 5: Solve for x
    x = 1,091,241,786.60/36,543
  6. Step 6: Final answer
    x = 29,861.86

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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.