Home / 20,861.37-28,784.03-11,906.01

Finding the Fourth Proportional to 20,861.37, 28,784.03 and 11,906.01

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Solution

The fourth proportional to 20,861.37, 28,784.03 and 11,906.01 is: 16,427.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.37 : 28,784.03 = 11,906.01 : x
  2. Step 2: Convert to fraction form
    20,861.37/28,784.03 = 11,906.01/x
  3. Step 3: Cross multiply
    20,861.37x = 28,784.03 × 11,906.01
  4. Step 4: Simplify right side
    20,861.37x = 342,702,889.49
  5. Step 5: Solve for x
    x = 342,702,889.49/20,861.37
  6. Step 6: Final answer
    x = 16,427.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.