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Finding the Fourth Proportional to 12,190, 18,285 and 2,956

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Solution

The fourth proportional to 12,190, 18,285 and 2,956 is: 4,434

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190 : 18,285 = 2,956 : x
  2. Step 2: Convert to fraction form
    12,190/18,285 = 2,956/x
  3. Step 3: Cross multiply
    12,190x = 18,285 × 2,956
  4. Step 4: Simplify right side
    12,190x = 54,050,460
  5. Step 5: Solve for x
    x = 54,050,460/12,190
  6. Step 6: Final answer
    x = 4,434

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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.