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Finding the Fourth Proportional to 19,891.68, 29,845.63 and 12,783.88

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Solution

The fourth proportional to 19,891.68, 29,845.63 and 12,783.88 is: 19,181.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.68 : 29,845.63 = 12,783.88 : x
  2. Step 2: Convert to fraction form
    19,891.68/29,845.63 = 12,783.88/x
  3. Step 3: Cross multiply
    19,891.68x = 29,845.63 × 12,783.88
  4. Step 4: Simplify right side
    19,891.68x = 381,542,952.44
  5. Step 5: Solve for x
    x = 381,542,952.44/19,891.68
  6. Step 6: Final answer
    x = 19,181.03

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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.