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Finding the Fourth Proportional to 13,850.51, 20,775.79 and 5,531.20

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Solution

The fourth proportional to 13,850.51, 20,775.79 and 5,531.20 is: 8,296.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,850.51 : 20,775.79 = 5,531.20 : x
  2. Step 2: Convert to fraction form
    13,850.51/20,775.79 = 5,531.20/x
  3. Step 3: Cross multiply
    13,850.51x = 20,775.79 × 5,531.20
  4. Step 4: Simplify right side
    13,850.51x = 114,915,049.65
  5. Step 5: Solve for x
    x = 114,915,049.65/13,850.51
  6. Step 6: Final answer
    x = 8,296.81

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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.