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Finding the Fourth Proportional to 39,863.81, 59,792.04 and 12,161.81

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Solution

The fourth proportional to 39,863.81, 59,792.04 and 12,161.81 is: 18,241.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,863.81 : 59,792.04 = 12,161.81 : x
  2. Step 2: Convert to fraction form
    39,863.81/59,792.04 = 12,161.81/x
  3. Step 3: Cross multiply
    39,863.81x = 59,792.04 × 12,161.81
  4. Step 4: Simplify right side
    39,863.81x = 727,179,131.03
  5. Step 5: Solve for x
    x = 727,179,131.03/39,863.81
  6. Step 6: Final answer
    x = 18,241.59

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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.