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Finding the Fourth Proportional to 9,392.70, 12,961.86 and 5,143.74

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Solution

The fourth proportional to 9,392.70, 12,961.86 and 5,143.74 is: 7,098.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,392.70 : 12,961.86 = 5,143.74 : x
  2. Step 2: Convert to fraction form
    9,392.70/12,961.86 = 5,143.74/x
  3. Step 3: Cross multiply
    9,392.70x = 12,961.86 × 5,143.74
  4. Step 4: Simplify right side
    9,392.70x = 66,672,437.76
  5. Step 5: Solve for x
    x = 66,672,437.76/9,392.70
  6. Step 6: Final answer
    x = 7,098.33

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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.