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Finding the Fourth Proportional to 19,198.52, 28,797.80 and 12,653.93

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Solution

The fourth proportional to 19,198.52, 28,797.80 and 12,653.93 is: 18,980.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,198.52 : 28,797.80 = 12,653.93 : x
  2. Step 2: Convert to fraction form
    19,198.52/28,797.80 = 12,653.93/x
  3. Step 3: Cross multiply
    19,198.52x = 28,797.80 × 12,653.93
  4. Step 4: Simplify right side
    19,198.52x = 364,405,345.35
  5. Step 5: Solve for x
    x = 364,405,345.35/19,198.52
  6. Step 6: Final answer
    x = 18,980.91

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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.