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Finding the Fourth Proportional to 6,412.64, 8,845.61 and 4,991.08

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Solution

The fourth proportional to 6,412.64, 8,845.61 and 4,991.08 is: 6,884.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,412.64 : 8,845.61 = 4,991.08 : x
  2. Step 2: Convert to fraction form
    6,412.64/8,845.61 = 4,991.08/x
  3. Step 3: Cross multiply
    6,412.64x = 8,845.61 × 4,991.08
  4. Step 4: Simplify right side
    6,412.64x = 44,149,147.16
  5. Step 5: Solve for x
    x = 44,149,147.16/6,412.64
  6. Step 6: Final answer
    x = 6,884.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.