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Finding the Fourth Proportional to 18,212.16, 27,319.20 and 5,064.48

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Solution

The fourth proportional to 18,212.16, 27,319.20 and 5,064.48 is: 7,596.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,212.16 : 27,319.20 = 5,064.48 : x
  2. Step 2: Convert to fraction form
    18,212.16/27,319.20 = 5,064.48/x
  3. Step 3: Cross multiply
    18,212.16x = 27,319.20 × 5,064.48
  4. Step 4: Simplify right side
    18,212.16x = 138,357,542.02
  5. Step 5: Solve for x
    x = 138,357,542.02/18,212.16
  6. Step 6: Final answer
    x = 7,596.99

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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.