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Finding the Fourth Proportional to 19,129.68, 26,399.28 and 11,063.28

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Solution

The fourth proportional to 19,129.68, 26,399.28 and 11,063.28 is: 15,267.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,129.68 : 26,399.28 = 11,063.28 : x
  2. Step 2: Convert to fraction form
    19,129.68/26,399.28 = 11,063.28/x
  3. Step 3: Cross multiply
    19,129.68x = 26,399.28 × 11,063.28
  4. Step 4: Simplify right side
    19,129.68x = 292,062,626.44
  5. Step 5: Solve for x
    x = 292,062,626.44/19,129.68
  6. Step 6: Final answer
    x = 15,267.51

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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.