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Finding the Fourth Proportional to 18,957.52, 26,153.08 and 11,399.48

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Solution

The fourth proportional to 18,957.52, 26,153.08 and 11,399.48 is: 15,726.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.52 : 26,153.08 = 11,399.48 : x
  2. Step 2: Convert to fraction form
    18,957.52/26,153.08 = 11,399.48/x
  3. Step 3: Cross multiply
    18,957.52x = 26,153.08 × 11,399.48
  4. Step 4: Simplify right side
    18,957.52x = 298,131,512.40
  5. Step 5: Solve for x
    x = 298,131,512.40/18,957.52
  6. Step 6: Final answer
    x = 15,726.29

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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.