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Finding the Fourth Proportional to 18,863.60, 26,028.14 and 12,147.89

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Solution

The fourth proportional to 18,863.60, 26,028.14 and 12,147.89 is: 16,761.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.60 : 26,028.14 = 12,147.89 : x
  2. Step 2: Convert to fraction form
    18,863.60/26,028.14 = 12,147.89/x
  3. Step 3: Cross multiply
    18,863.60x = 26,028.14 × 12,147.89
  4. Step 4: Simplify right side
    18,863.60x = 316,186,790.74
  5. Step 5: Solve for x
    x = 316,186,790.74/18,863.60
  6. Step 6: Final answer
    x = 16,761.75

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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.