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Finding the Fourth Proportional to 18,393.72, 25,321.08 and 16,619.76

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Solution

The fourth proportional to 18,393.72, 25,321.08 and 16,619.76 is: 22,879.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,393.72 : 25,321.08 = 16,619.76 : x
  2. Step 2: Convert to fraction form
    18,393.72/25,321.08 = 16,619.76/x
  3. Step 3: Cross multiply
    18,393.72x = 25,321.08 × 16,619.76
  4. Step 4: Simplify right side
    18,393.72x = 420,830,272.54
  5. Step 5: Solve for x
    x = 420,830,272.54/18,393.72
  6. Step 6: Final answer
    x = 22,879.02

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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.