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Finding the Fourth Proportional to 12,203.65, 18,296.97 and 5,620.78

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Solution

The fourth proportional to 12,203.65, 18,296.97 and 5,620.78 is: 8,427.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,203.65 : 18,296.97 = 5,620.78 : x
  2. Step 2: Convert to fraction form
    12,203.65/18,296.97 = 5,620.78/x
  3. Step 3: Cross multiply
    12,203.65x = 18,296.97 × 5,620.78
  4. Step 4: Simplify right side
    12,203.65x = 102,843,243.04
  5. Step 5: Solve for x
    x = 102,843,243.04/12,203.65
  6. Step 6: Final answer
    x = 8,427.25

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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.