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Finding the Fourth Proportional to 12,389.86, 18,584.79 and 5,469.22

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Solution

The fourth proportional to 12,389.86, 18,584.79 and 5,469.22 is: 8,203.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.86 : 18,584.79 = 5,469.22 : x
  2. Step 2: Convert to fraction form
    12,389.86/18,584.79 = 5,469.22/x
  3. Step 3: Cross multiply
    12,389.86x = 18,584.79 × 5,469.22
  4. Step 4: Simplify right side
    12,389.86x = 101,644,305.16
  5. Step 5: Solve for x
    x = 101,644,305.16/12,389.86
  6. Step 6: Final answer
    x = 8,203.83

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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.