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Finding the Fourth Proportional to 18,693.91, 25,791.21 and 10,626.75

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Solution

The fourth proportional to 18,693.91, 25,791.21 and 10,626.75 is: 14,661.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.91 : 25,791.21 = 10,626.75 : x
  2. Step 2: Convert to fraction form
    18,693.91/25,791.21 = 10,626.75/x
  3. Step 3: Cross multiply
    18,693.91x = 25,791.21 × 10,626.75
  4. Step 4: Simplify right side
    18,693.91x = 274,076,740.87
  5. Step 5: Solve for x
    x = 274,076,740.87/18,693.91
  6. Step 6: Final answer
    x = 14,661.29

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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.