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Finding the Fourth Proportional to 18,906.68, 28,359.15 and 7,059.53

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Solution

The fourth proportional to 18,906.68, 28,359.15 and 7,059.53 is: 10,588.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.68 : 28,359.15 = 7,059.53 : x
  2. Step 2: Convert to fraction form
    18,906.68/28,359.15 = 7,059.53/x
  3. Step 3: Cross multiply
    18,906.68x = 28,359.15 × 7,059.53
  4. Step 4: Simplify right side
    18,906.68x = 200,202,128.40
  5. Step 5: Solve for x
    x = 200,202,128.40/18,906.68
  6. Step 6: Final answer
    x = 10,588.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.