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Finding the Fourth Proportional to 18,692.70, 25,764.66 and 16,418.22

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Solution

The fourth proportional to 18,692.70, 25,764.66 and 16,418.22 is: 22,629.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692.70 : 25,764.66 = 16,418.22 : x
  2. Step 2: Convert to fraction form
    18,692.70/25,764.66 = 16,418.22/x
  3. Step 3: Cross multiply
    18,692.70x = 25,764.66 × 16,418.22
  4. Step 4: Simplify right side
    18,692.70x = 423,009,856.11
  5. Step 5: Solve for x
    x = 423,009,856.11/18,692.70
  6. Step 6: Final answer
    x = 22,629.68

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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.