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Finding the Fourth Proportional to 20,536.70, 30,819.45 and 8,858.30

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Solution

The fourth proportional to 20,536.70, 30,819.45 and 8,858.30 is: 13,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,536.70 : 30,819.45 = 8,858.30 : x
  2. Step 2: Convert to fraction form
    20,536.70/30,819.45 = 8,858.30/x
  3. Step 3: Cross multiply
    20,536.70x = 30,819.45 × 8,858.30
  4. Step 4: Simplify right side
    20,536.70x = 273,007,933.94
  5. Step 5: Solve for x
    x = 273,007,933.94/20,536.70
  6. Step 6: Final answer
    x = 13,293.66

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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.