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Finding the Fourth Proportional to 13,881.90, 20,844.45 and 8,049.90

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Solution

The fourth proportional to 13,881.90, 20,844.45 and 8,049.90 is: 12,087.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.90 : 20,844.45 = 8,049.90 : x
  2. Step 2: Convert to fraction form
    13,881.90/20,844.45 = 8,049.90/x
  3. Step 3: Cross multiply
    13,881.90x = 20,844.45 × 8,049.90
  4. Step 4: Simplify right side
    13,881.90x = 167,795,738.06
  5. Step 5: Solve for x
    x = 167,795,738.06/13,881.90
  6. Step 6: Final answer
    x = 12,087.38

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1.5x scale

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.