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Finding the Fourth Proportional to 13,659.39, 20,489.11 and 3,798.68

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Solution

The fourth proportional to 13,659.39, 20,489.11 and 3,798.68 is: 5,698.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.39 : 20,489.11 = 3,798.68 : x
  2. Step 2: Convert to fraction form
    13,659.39/20,489.11 = 3,798.68/x
  3. Step 3: Cross multiply
    13,659.39x = 20,489.11 × 3,798.68
  4. Step 4: Simplify right side
    13,659.39x = 77,831,460.43
  5. Step 5: Solve for x
    x = 77,831,460.43/13,659.39
  6. Step 6: Final answer
    x = 5,698.02

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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.