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Finding the Fourth Proportional to 9,391.69, 12,956.79 and 8,645.68

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Solution

The fourth proportional to 9,391.69, 12,956.79 and 8,645.68 is: 11,927.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,391.69 : 12,956.79 = 8,645.68 : x
  2. Step 2: Convert to fraction form
    9,391.69/12,956.79 = 8,645.68/x
  3. Step 3: Cross multiply
    9,391.69x = 12,956.79 × 8,645.68
  4. Step 4: Simplify right side
    9,391.69x = 112,020,260.17
  5. Step 5: Solve for x
    x = 112,020,260.17/9,391.69
  6. Step 6: Final answer
    x = 11,927.59

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Double scale
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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.