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Finding the Fourth Proportional to 17,673.78, 26,515.80 and 11,005.86

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Solution

The fourth proportional to 17,673.78, 26,515.80 and 11,005.86 is: 16,511.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,673.78 : 26,515.80 = 11,005.86 : x
  2. Step 2: Convert to fraction form
    17,673.78/26,515.80 = 11,005.86/x
  3. Step 3: Cross multiply
    17,673.78x = 26,515.80 × 11,005.86
  4. Step 4: Simplify right side
    17,673.78x = 291,829,182.59
  5. Step 5: Solve for x
    x = 291,829,182.59/17,673.78
  6. Step 6: Final answer
    x = 16,511.98

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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.