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Finding the Fourth Proportional to 13,659.60, 20,494.24 and 4,425.60

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Solution

The fourth proportional to 13,659.60, 20,494.24 and 4,425.60 is: 6,639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.60 : 20,494.24 = 4,425.60 : x
  2. Step 2: Convert to fraction form
    13,659.60/20,494.24 = 4,425.60/x
  3. Step 3: Cross multiply
    13,659.60x = 20,494.24 × 4,425.60
  4. Step 4: Simplify right side
    13,659.60x = 90,699,308.54
  5. Step 5: Solve for x
    x = 90,699,308.54/13,659.60
  6. Step 6: Final answer
    x = 6,639.97

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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.