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Finding the Fourth Proportional to 13,843.88, 20,731.88 and 12,512.60

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Solution

The fourth proportional to 13,843.88, 20,731.88 and 12,512.60 is: 18,738.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,843.88 : 20,731.88 = 12,512.60 : x
  2. Step 2: Convert to fraction form
    13,843.88/20,731.88 = 12,512.60/x
  3. Step 3: Cross multiply
    13,843.88x = 20,731.88 × 12,512.60
  4. Step 4: Simplify right side
    13,843.88x = 259,409,649.31
  5. Step 5: Solve for x
    x = 259,409,649.31/13,843.88
  6. Step 6: Final answer
    x = 18,738.23

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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.