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Finding the Fourth Proportional to 18,640.38, 25,723.71 and 10,682.22

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Solution

The fourth proportional to 18,640.38, 25,723.71 and 10,682.22 is: 14,741.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.38 : 25,723.71 = 10,682.22 : x
  2. Step 2: Convert to fraction form
    18,640.38/25,723.71 = 10,682.22/x
  3. Step 3: Cross multiply
    18,640.38x = 25,723.71 × 10,682.22
  4. Step 4: Simplify right side
    18,640.38x = 274,786,329.44
  5. Step 5: Solve for x
    x = 274,786,329.44/18,640.38
  6. Step 6: Final answer
    x = 14,741.46

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Double scale
Find fourth proportional to 18,641.38, 25,725.09 and 10,683.22
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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.