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Finding the Fourth Proportional to 19,157.91, 28,712.50 and 8,616.66

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Solution

The fourth proportional to 19,157.91, 28,712.50 and 8,616.66 is: 12,914.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,157.91 : 28,712.50 = 8,616.66 : x
  2. Step 2: Convert to fraction form
    19,157.91/28,712.50 = 8,616.66/x
  3. Step 3: Cross multiply
    19,157.91x = 28,712.50 × 8,616.66
  4. Step 4: Simplify right side
    19,157.91x = 247,405,850.25
  5. Step 5: Solve for x
    x = 247,405,850.25/19,157.91
  6. Step 6: Final answer
    x = 12,914.03

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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.