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Finding the Fourth Proportional to 20,396.80, 30,536.80 and 12,552.80

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Solution

The fourth proportional to 20,396.80, 30,536.80 and 12,552.80 is: 18,793.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.80 : 30,536.80 = 12,552.80 : x
  2. Step 2: Convert to fraction form
    20,396.80/30,536.80 = 12,552.80/x
  3. Step 3: Cross multiply
    20,396.80x = 30,536.80 × 12,552.80
  4. Step 4: Simplify right side
    20,396.80x = 383,322,343.04
  5. Step 5: Solve for x
    x = 383,322,343.04/20,396.80
  6. Step 6: Final answer
    x = 18,793.26

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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.