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Finding the Fourth Proportional to 13,916.22, 20,865.06 and 7,236.30

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Solution

The fourth proportional to 13,916.22, 20,865.06 and 7,236.30 is: 10,849.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,916.22 : 20,865.06 = 7,236.30 : x
  2. Step 2: Convert to fraction form
    13,916.22/20,865.06 = 7,236.30/x
  3. Step 3: Cross multiply
    13,916.22x = 20,865.06 × 7,236.30
  4. Step 4: Simplify right side
    13,916.22x = 150,985,833.68
  5. Step 5: Solve for x
    x = 150,985,833.68/13,916.22
  6. Step 6: Final answer
    x = 10,849.63

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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.