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Finding the Fourth Proportional to 7,935, 11,902.50 and 3,318

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Solution

The fourth proportional to 7,935, 11,902.50 and 3,318 is: 4,977

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,935 : 11,902.50 = 3,318 : x
  2. Step 2: Convert to fraction form
    7,935/11,902.50 = 3,318/x
  3. Step 3: Cross multiply
    7,935x = 11,902.50 × 3,318
  4. Step 4: Simplify right side
    7,935x = 39,492,495
  5. Step 5: Solve for x
    x = 39,492,495/7,935
  6. Step 6: Final answer
    x = 4,977

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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.