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Finding the Fourth Proportional to 18,412.22, 27,621.94 and 7,316.84

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Solution

The fourth proportional to 18,412.22, 27,621.94 and 7,316.84 is: 10,976.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412.22 : 27,621.94 = 7,316.84 : x
  2. Step 2: Convert to fraction form
    18,412.22/27,621.94 = 7,316.84/x
  3. Step 3: Cross multiply
    18,412.22x = 27,621.94 × 7,316.84
  4. Step 4: Simplify right side
    18,412.22x = 202,105,315.47
  5. Step 5: Solve for x
    x = 202,105,315.47/18,412.22
  6. Step 6: Final answer
    x = 10,976.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.