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Finding the Fourth Proportional to 18,719.25, 25,859.90 and 16,196.98

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Solution

The fourth proportional to 18,719.25, 25,859.90 and 16,196.98 is: 22,375.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.25 : 25,859.90 = 16,196.98 : x
  2. Step 2: Convert to fraction form
    18,719.25/25,859.90 = 16,196.98/x
  3. Step 3: Cross multiply
    18,719.25x = 25,859.90 × 16,196.98
  4. Step 4: Simplify right side
    18,719.25x = 418,852,283.10
  5. Step 5: Solve for x
    x = 418,852,283.10/18,719.25
  6. Step 6: Final answer
    x = 22,375.48

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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.