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Finding the Fourth Proportional to 19,261.70, 28,891.23 and 5,410.70

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Solution

The fourth proportional to 19,261.70, 28,891.23 and 5,410.70 is: 8,115.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,261.70 : 28,891.23 = 5,410.70 : x
  2. Step 2: Convert to fraction form
    19,261.70/28,891.23 = 5,410.70/x
  3. Step 3: Cross multiply
    19,261.70x = 28,891.23 × 5,410.70
  4. Step 4: Simplify right side
    19,261.70x = 156,321,778.16
  5. Step 5: Solve for x
    x = 156,321,778.16/19,261.70
  6. Step 6: Final answer
    x = 8,115.68

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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.