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Finding the Fourth Proportional to 7,410, 11,115 and 1,938

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Solution

The fourth proportional to 7,410, 11,115 and 1,938 is: 2,907

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,410 : 11,115 = 1,938 : x
  2. Step 2: Convert to fraction form
    7,410/11,115 = 1,938/x
  3. Step 3: Cross multiply
    7,410x = 11,115 × 1,938
  4. Step 4: Simplify right side
    7,410x = 21,540,870
  5. Step 5: Solve for x
    x = 21,540,870/7,410
  6. Step 6: Final answer
    x = 2,907

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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.