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Finding the Fourth Proportional to 12,190.49, 18,285.73 and 2,956.49

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Solution

The fourth proportional to 12,190.49, 18,285.73 and 2,956.49 is: 4,434.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.49 : 18,285.73 = 2,956.49 : x
  2. Step 2: Convert to fraction form
    12,190.49/18,285.73 = 2,956.49/x
  3. Step 3: Cross multiply
    12,190.49x = 18,285.73 × 2,956.49
  4. Step 4: Simplify right side
    12,190.49x = 54,061,577.89
  5. Step 5: Solve for x
    x = 54,061,577.89/12,190.49
  6. Step 6: Final answer
    x = 4,434.73

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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.