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Finding the Fourth Proportional to 9,358.92, 12,905.38 and 8,153.56

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Solution

The fourth proportional to 9,358.92, 12,905.38 and 8,153.56 is: 11,243.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,358.92 : 12,905.38 = 8,153.56 : x
  2. Step 2: Convert to fraction form
    9,358.92/12,905.38 = 8,153.56/x
  3. Step 3: Cross multiply
    9,358.92x = 12,905.38 × 8,153.56
  4. Step 4: Simplify right side
    9,358.92x = 105,224,770.61
  5. Step 5: Solve for x
    x = 105,224,770.61/9,358.92
  6. Step 6: Final answer
    x = 11,243.26

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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.