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Finding the Fourth Proportional to 13,055.68, 18,016.93 and 7,390.44

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Solution

The fourth proportional to 13,055.68, 18,016.93 and 7,390.44 is: 10,198.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.68 : 18,016.93 = 7,390.44 : x
  2. Step 2: Convert to fraction form
    13,055.68/18,016.93 = 7,390.44/x
  3. Step 3: Cross multiply
    13,055.68x = 18,016.93 × 7,390.44
  4. Step 4: Simplify right side
    13,055.68x = 133,153,049.39
  5. Step 5: Solve for x
    x = 133,153,049.39/13,055.68
  6. Step 6: Final answer
    x = 10,198.86

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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.