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Finding the Fourth Proportional to 14,636.41, 20,198.16 and 7,921.99

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Solution

The fourth proportional to 14,636.41, 20,198.16 and 7,921.99 is: 10,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,636.41 : 20,198.16 = 7,921.99 : x
  2. Step 2: Convert to fraction form
    14,636.41/20,198.16 = 7,921.99/x
  3. Step 3: Cross multiply
    14,636.41x = 20,198.16 × 7,921.99
  4. Step 4: Simplify right side
    14,636.41x = 160,009,621.54
  5. Step 5: Solve for x
    x = 160,009,621.54/14,636.41
  6. Step 6: Final answer
    x = 10,932.30

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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.