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Finding the Fourth Proportional to 19,812.92, 29,512.91 and 18,761.09

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Solution

The fourth proportional to 19,812.92, 29,512.91 and 18,761.09 is: 27,946.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,812.92 : 29,512.91 = 18,761.09 : x
  2. Step 2: Convert to fraction form
    19,812.92/29,512.91 = 18,761.09/x
  3. Step 3: Cross multiply
    19,812.92x = 29,512.91 × 18,761.09
  4. Step 4: Simplify right side
    19,812.92x = 553,694,213.11
  5. Step 5: Solve for x
    x = 553,694,213.11/19,812.92
  6. Step 6: Final answer
    x = 27,946.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.