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Finding the Fourth Proportional to 19,191.20, 28,789.88 and 8,099.53

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Solution

The fourth proportional to 19,191.20, 28,789.88 and 8,099.53 is: 12,150.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191.20 : 28,789.88 = 8,099.53 : x
  2. Step 2: Convert to fraction form
    19,191.20/28,789.88 = 8,099.53/x
  3. Step 3: Cross multiply
    19,191.20x = 28,789.88 × 8,099.53
  4. Step 4: Simplify right side
    19,191.20x = 233,184,384.28
  5. Step 5: Solve for x
    x = 233,184,384.28/19,191.20
  6. Step 6: Final answer
    x = 12,150.59

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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.