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Finding the Fourth Proportional to 20,596.78, 28,396.07 and 16,361.90

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Solution

The fourth proportional to 20,596.78, 28,396.07 and 16,361.90 is: 22,557.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,596.78 : 28,396.07 = 16,361.90 : x
  2. Step 2: Convert to fraction form
    20,596.78/28,396.07 = 16,361.90/x
  3. Step 3: Cross multiply
    20,596.78x = 28,396.07 × 16,361.90
  4. Step 4: Simplify right side
    20,596.78x = 464,613,601.79
  5. Step 5: Solve for x
    x = 464,613,601.79/20,596.78
  6. Step 6: Final answer
    x = 22,557.58

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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.