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Finding the Fourth Proportional to 17,691.64, 26,537.72 and 4,543.72

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Solution

The fourth proportional to 17,691.64, 26,537.72 and 4,543.72 is: 6,815.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,691.64 : 26,537.72 = 4,543.72 : x
  2. Step 2: Convert to fraction form
    17,691.64/26,537.72 = 4,543.72/x
  3. Step 3: Cross multiply
    17,691.64x = 26,537.72 × 4,543.72
  4. Step 4: Simplify right side
    17,691.64x = 120,579,813.71
  5. Step 5: Solve for x
    x = 120,579,813.71/17,691.64
  6. Step 6: Final answer
    x = 6,815.64

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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.