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Finding the Fourth Proportional to 19,666, 27,139.32 and 11,283.28

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Solution

The fourth proportional to 19,666, 27,139.32 and 11,283.28 is: 15,571.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,666 : 27,139.32 = 11,283.28 : x
  2. Step 2: Convert to fraction form
    19,666/27,139.32 = 11,283.28/x
  3. Step 3: Cross multiply
    19,666x = 27,139.32 × 11,283.28
  4. Step 4: Simplify right side
    19,666x = 306,220,546.57
  5. Step 5: Solve for x
    x = 306,220,546.57/19,666
  6. Step 6: Final answer
    x = 15,571.06

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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.