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Finding the Fourth Proportional to 8,179.76, 12,268.96 and 2,631.64

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Solution

The fourth proportional to 8,179.76, 12,268.96 and 2,631.64 is: 3,947.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,179.76 : 12,268.96 = 2,631.64 : x
  2. Step 2: Convert to fraction form
    8,179.76/12,268.96 = 2,631.64/x
  3. Step 3: Cross multiply
    8,179.76x = 12,268.96 × 2,631.64
  4. Step 4: Simplify right side
    8,179.76x = 32,287,485.89
  5. Step 5: Solve for x
    x = 32,287,485.89/8,179.76
  6. Step 6: Final answer
    x = 3,947.24

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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.