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Finding the Fourth Proportional to 13,659.77, 20,489.67 and 3,799.05

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Solution

The fourth proportional to 13,659.77, 20,489.67 and 3,799.05 is: 5,698.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.77 : 20,489.67 = 3,799.05 : x
  2. Step 2: Convert to fraction form
    13,659.77/20,489.67 = 3,799.05/x
  3. Step 3: Cross multiply
    13,659.77x = 20,489.67 × 3,799.05
  4. Step 4: Simplify right side
    13,659.77x = 77,841,280.81
  5. Step 5: Solve for x
    x = 77,841,280.81/13,659.77
  6. Step 6: Final answer
    x = 5,698.58

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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.