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Finding the Fourth Proportional to 14,819.85, 20,451.69 and 8,105.94

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Solution

The fourth proportional to 14,819.85, 20,451.69 and 8,105.94 is: 11,186.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,819.85 : 20,451.69 = 8,105.94 : x
  2. Step 2: Convert to fraction form
    14,819.85/20,451.69 = 8,105.94/x
  3. Step 3: Cross multiply
    14,819.85x = 20,451.69 × 8,105.94
  4. Step 4: Simplify right side
    14,819.85x = 165,780,172.04
  5. Step 5: Solve for x
    x = 165,780,172.04/14,819.85
  6. Step 6: Final answer
    x = 11,186.36

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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.