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Finding the Fourth Proportional to 13,486.16, 20,231.40 and 4,250

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Solution

The fourth proportional to 13,486.16, 20,231.40 and 4,250 is: 6,375.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.16 : 20,231.40 = 4,250 : x
  2. Step 2: Convert to fraction form
    13,486.16/20,231.40 = 4,250/x
  3. Step 3: Cross multiply
    13,486.16x = 20,231.40 × 4,250
  4. Step 4: Simplify right side
    13,486.16x = 85,983,450
  5. Step 5: Solve for x
    x = 85,983,450/13,486.16
  6. Step 6: Final answer
    x = 6,375.68

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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.