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Finding the Fourth Proportional to 43,596.38, 65,381.78 and 19,890.50

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Solution

The fourth proportional to 43,596.38, 65,381.78 and 19,890.50 is: 29,829.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,596.38 : 65,381.78 = 19,890.50 : x
  2. Step 2: Convert to fraction form
    43,596.38/65,381.78 = 19,890.50/x
  3. Step 3: Cross multiply
    43,596.38x = 65,381.78 × 19,890.50
  4. Step 4: Simplify right side
    43,596.38x = 1,300,476,295.09
  5. Step 5: Solve for x
    x = 1,300,476,295.09/43,596.38
  6. Step 6: Final answer
    x = 29,829.91

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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.