Home / 13,881.83-20,781.83-8,936.78

Finding the Fourth Proportional to 13,881.83, 20,781.83 and 8,936.78

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Solution

The fourth proportional to 13,881.83, 20,781.83 and 8,936.78 is: 13,378.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.83 : 20,781.83 = 8,936.78 : x
  2. Step 2: Convert to fraction form
    13,881.83/20,781.83 = 8,936.78/x
  3. Step 3: Cross multiply
    13,881.83x = 20,781.83 × 8,936.78
  4. Step 4: Simplify right side
    13,881.83x = 185,722,561.14
  5. Step 5: Solve for x
    x = 185,722,561.14/13,881.83
  6. Step 6: Final answer
    x = 13,378.83

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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.