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Finding the Fourth Proportional to 19,863.70, 27,411.94 and 10,911.78

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Solution

The fourth proportional to 19,863.70, 27,411.94 and 10,911.78 is: 15,058.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,863.70 : 27,411.94 = 10,911.78 : x
  2. Step 2: Convert to fraction form
    19,863.70/27,411.94 = 10,911.78/x
  3. Step 3: Cross multiply
    19,863.70x = 27,411.94 × 10,911.78
  4. Step 4: Simplify right side
    19,863.70x = 299,113,058.65
  5. Step 5: Solve for x
    x = 299,113,058.65/19,863.70
  6. Step 6: Final answer
    x = 15,058.28

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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.