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Finding the Fourth Proportional to 12,591.60, 17,378.28 and 7,286.64

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Solution

The fourth proportional to 12,591.60, 17,378.28 and 7,286.64 is: 10,056.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.60 : 17,378.28 = 7,286.64 : x
  2. Step 2: Convert to fraction form
    12,591.60/17,378.28 = 7,286.64/x
  3. Step 3: Cross multiply
    12,591.60x = 17,378.28 × 7,286.64
  4. Step 4: Simplify right side
    12,591.60x = 126,629,270.18
  5. Step 5: Solve for x
    x = 126,629,270.18/12,591.60
  6. Step 6: Final answer
    x = 10,056.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.