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Finding the Fourth Proportional to 18,640.67, 25,724.21 and 10,683.36

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Solution

The fourth proportional to 18,640.67, 25,724.21 and 10,683.36 is: 14,743.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.67 : 25,724.21 = 10,683.36 : x
  2. Step 2: Convert to fraction form
    18,640.67/25,724.21 = 10,683.36/x
  3. Step 3: Cross multiply
    18,640.67x = 25,724.21 × 10,683.36
  4. Step 4: Simplify right side
    18,640.67x = 274,820,942.73
  5. Step 5: Solve for x
    x = 274,820,942.73/18,640.67
  6. Step 6: Final answer
    x = 14,743.09

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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.