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Finding the Fourth Proportional to 19,012.92, 28,509.12 and 8,619

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Solution

The fourth proportional to 19,012.92, 28,509.12 and 8,619 is: 12,923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,012.92 : 28,509.12 = 8,619 : x
  2. Step 2: Convert to fraction form
    19,012.92/28,509.12 = 8,619/x
  3. Step 3: Cross multiply
    19,012.92x = 28,509.12 × 8,619
  4. Step 4: Simplify right side
    19,012.92x = 245,720,105.28
  5. Step 5: Solve for x
    x = 245,720,105.28/19,012.92
  6. Step 6: Final answer
    x = 12,923.85

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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.