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Finding the Fourth Proportional to 19,990.32, 29,947.32 and 11,198.64

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Solution

The fourth proportional to 19,990.32, 29,947.32 and 11,198.64 is: 16,776.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.32 : 29,947.32 = 11,198.64 : x
  2. Step 2: Convert to fraction form
    19,990.32/29,947.32 = 11,198.64/x
  3. Step 3: Cross multiply
    19,990.32x = 29,947.32 × 11,198.64
  4. Step 4: Simplify right side
    19,990.32x = 335,369,255.64
  5. Step 5: Solve for x
    x = 335,369,255.64/19,990.32
  6. Step 6: Final answer
    x = 16,776.58

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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.