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Finding the Fourth Proportional to 11,897.80, 17,829.60 and 6,692.68

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Solution

The fourth proportional to 11,897.80, 17,829.60 and 6,692.68 is: 10,029.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,897.80 : 17,829.60 = 6,692.68 : x
  2. Step 2: Convert to fraction form
    11,897.80/17,829.60 = 6,692.68/x
  3. Step 3: Cross multiply
    11,897.80x = 17,829.60 × 6,692.68
  4. Step 4: Simplify right side
    11,897.80x = 119,327,807.33
  5. Step 5: Solve for x
    x = 119,327,807.33/11,897.80
  6. Step 6: Final answer
    x = 10,029.40

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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.