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Finding the Fourth Proportional to 7,044.16, 9,721.60 and 3,900.96

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Solution

The fourth proportional to 7,044.16, 9,721.60 and 3,900.96 is: 5,383.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,044.16 : 9,721.60 = 3,900.96 : x
  2. Step 2: Convert to fraction form
    7,044.16/9,721.60 = 3,900.96/x
  3. Step 3: Cross multiply
    7,044.16x = 9,721.60 × 3,900.96
  4. Step 4: Simplify right side
    7,044.16x = 37,923,572.74
  5. Step 5: Solve for x
    x = 37,923,572.74/7,044.16
  6. Step 6: Final answer
    x = 5,383.69

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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.