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Finding the Fourth Proportional to 8,651.38, 12,974.91 and 2,809.66

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Solution

The fourth proportional to 8,651.38, 12,974.91 and 2,809.66 is: 4,213.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.38 : 12,974.91 = 2,809.66 : x
  2. Step 2: Convert to fraction form
    8,651.38/12,974.91 = 2,809.66/x
  3. Step 3: Cross multiply
    8,651.38x = 12,974.91 × 2,809.66
  4. Step 4: Simplify right side
    8,651.38x = 36,455,085.63
  5. Step 5: Solve for x
    x = 36,455,085.63/8,651.38
  6. Step 6: Final answer
    x = 4,213.79

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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.