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Finding the Fourth Proportional to 7,318.99, 10,979 and 2,936.45

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Solution

The fourth proportional to 7,318.99, 10,979 and 2,936.45 is: 4,404.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.99 : 10,979 = 2,936.45 : x
  2. Step 2: Convert to fraction form
    7,318.99/10,979 = 2,936.45/x
  3. Step 3: Cross multiply
    7,318.99x = 10,979 × 2,936.45
  4. Step 4: Simplify right side
    7,318.99x = 32,239,284.55
  5. Step 5: Solve for x
    x = 32,239,284.55/7,318.99
  6. Step 6: Final answer
    x = 4,404.88

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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.