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Finding the Fourth Proportional to 6,613.78, 9,907.44 and 3,979.83

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Solution

The fourth proportional to 6,613.78, 9,907.44 and 3,979.83 is: 5,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.78 : 9,907.44 = 3,979.83 : x
  2. Step 2: Convert to fraction form
    6,613.78/9,907.44 = 3,979.83/x
  3. Step 3: Cross multiply
    6,613.78x = 9,907.44 × 3,979.83
  4. Step 4: Simplify right side
    6,613.78x = 39,429,926.94
  5. Step 5: Solve for x
    x = 39,429,926.94/6,613.78
  6. Step 6: Final answer
    x = 5,961.78

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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.