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Finding the Fourth Proportional to 13,923.60, 20,901.60 and 8,383.20

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Solution

The fourth proportional to 13,923.60, 20,901.60 and 8,383.20 is: 12,584.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,923.60 : 20,901.60 = 8,383.20 : x
  2. Step 2: Convert to fraction form
    13,923.60/20,901.60 = 8,383.20/x
  3. Step 3: Cross multiply
    13,923.60x = 20,901.60 × 8,383.20
  4. Step 4: Simplify right side
    13,923.60x = 175,222,293.12
  5. Step 5: Solve for x
    x = 175,222,293.12/13,923.60
  6. Step 6: Final answer
    x = 12,584.55

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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.