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Finding the Fourth Proportional to 19,006.92, 28,500.12 and 8,613

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Solution

The fourth proportional to 19,006.92, 28,500.12 and 8,613 is: 12,914.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,006.92 : 28,500.12 = 8,613 : x
  2. Step 2: Convert to fraction form
    19,006.92/28,500.12 = 8,613/x
  3. Step 3: Cross multiply
    19,006.92x = 28,500.12 × 8,613
  4. Step 4: Simplify right side
    19,006.92x = 245,471,533.56
  5. Step 5: Solve for x
    x = 245,471,533.56/19,006.92
  6. Step 6: Final answer
    x = 12,914.85

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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.