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Finding the Fourth Proportional to 18,861.66, 26,018.01 and 11,791.58

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Solution

The fourth proportional to 18,861.66, 26,018.01 and 11,791.58 is: 16,265.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.66 : 26,018.01 = 11,791.58 : x
  2. Step 2: Convert to fraction form
    18,861.66/26,018.01 = 11,791.58/x
  3. Step 3: Cross multiply
    18,861.66x = 26,018.01 × 11,791.58
  4. Step 4: Simplify right side
    18,861.66x = 306,793,316.27
  5. Step 5: Solve for x
    x = 306,793,316.27/18,861.66
  6. Step 6: Final answer
    x = 16,265.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.