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Finding the Fourth Proportional to 8,761.53, 12,082.74 and 5,772.18

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Solution

The fourth proportional to 8,761.53, 12,082.74 and 5,772.18 is: 7,960.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.53 : 12,082.74 = 5,772.18 : x
  2. Step 2: Convert to fraction form
    8,761.53/12,082.74 = 5,772.18/x
  3. Step 3: Cross multiply
    8,761.53x = 12,082.74 × 5,772.18
  4. Step 4: Simplify right side
    8,761.53x = 69,743,750.17
  5. Step 5: Solve for x
    x = 69,743,750.17/8,761.53
  6. Step 6: Final answer
    x = 7,960.23

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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.