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Finding the Fourth Proportional to 12,190.94, 18,286.44 and 2,956.94

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Solution

The fourth proportional to 12,190.94, 18,286.44 and 2,956.94 is: 4,435.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.94 : 18,286.44 = 2,956.94 : x
  2. Step 2: Convert to fraction form
    12,190.94/18,286.44 = 2,956.94/x
  3. Step 3: Cross multiply
    12,190.94x = 18,286.44 × 2,956.94
  4. Step 4: Simplify right side
    12,190.94x = 54,071,905.89
  5. Step 5: Solve for x
    x = 54,071,905.89/12,190.94
  6. Step 6: Final answer
    x = 4,435.42

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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.