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Finding the Fourth Proportional to 18,978.26, 26,195.56 and 11,024.06

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Solution

The fourth proportional to 18,978.26, 26,195.56 and 11,024.06 is: 15,216.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.26 : 26,195.56 = 11,024.06 : x
  2. Step 2: Convert to fraction form
    18,978.26/26,195.56 = 11,024.06/x
  3. Step 3: Cross multiply
    18,978.26x = 26,195.56 × 11,024.06
  4. Step 4: Simplify right side
    18,978.26x = 288,781,425.17
  5. Step 5: Solve for x
    x = 288,781,425.17/18,978.26
  6. Step 6: Final answer
    x = 15,216.43

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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.