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Finding the Fourth Proportional to 13,659.89, 20,489.86 and 3,799.18

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Solution

The fourth proportional to 13,659.89, 20,489.86 and 3,799.18 is: 5,698.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.89 : 20,489.86 = 3,799.18 : x
  2. Step 2: Convert to fraction form
    13,659.89/20,489.86 = 3,799.18/x
  3. Step 3: Cross multiply
    13,659.89x = 20,489.86 × 3,799.18
  4. Step 4: Simplify right side
    13,659.89x = 77,844,563.87
  5. Step 5: Solve for x
    x = 77,844,563.87/13,659.89
  6. Step 6: Final answer
    x = 5,698.77

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Similar ratio
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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.