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Finding the Fourth Proportional to 20,597.98, 28,415.19 and 12,208.54

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Solution

The fourth proportional to 20,597.98, 28,415.19 and 12,208.54 is: 16,841.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,597.98 : 28,415.19 = 12,208.54 : x
  2. Step 2: Convert to fraction form
    20,597.98/28,415.19 = 12,208.54/x
  3. Step 3: Cross multiply
    20,597.98x = 28,415.19 × 12,208.54
  4. Step 4: Simplify right side
    20,597.98x = 346,907,983.72
  5. Step 5: Solve for x
    x = 346,907,983.72/20,597.98
  6. Step 6: Final answer
    x = 16,841.84

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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.