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Finding the Fourth Proportional to 8,809.38, 13,145.73 and 7,874.64

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Solution

The fourth proportional to 8,809.38, 13,145.73 and 7,874.64 is: 11,750.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.38 : 13,145.73 = 7,874.64 : x
  2. Step 2: Convert to fraction form
    8,809.38/13,145.73 = 7,874.64/x
  3. Step 3: Cross multiply
    8,809.38x = 13,145.73 × 7,874.64
  4. Step 4: Simplify right side
    8,809.38x = 103,517,891.29
  5. Step 5: Solve for x
    x = 103,517,891.29/8,809.38
  6. Step 6: Final answer
    x = 11,750.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.