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Finding the Fourth Proportional to 8,908.68, 12,286.92 and 8,312.52

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Solution

The fourth proportional to 8,908.68, 12,286.92 and 8,312.52 is: 11,464.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,908.68 : 12,286.92 = 8,312.52 : x
  2. Step 2: Convert to fraction form
    8,908.68/12,286.92 = 8,312.52/x
  3. Step 3: Cross multiply
    8,908.68x = 12,286.92 × 8,312.52
  4. Step 4: Simplify right side
    8,908.68x = 102,135,268.24
  5. Step 5: Solve for x
    x = 102,135,268.24/8,908.68
  6. Step 6: Final answer
    x = 11,464.69

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1.5x scale

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.