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Finding the Fourth Proportional to 20,615.10, 28,450.22 and 11,662.98

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Solution

The fourth proportional to 20,615.10, 28,450.22 and 11,662.98 is: 16,095.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.10 : 28,450.22 = 11,662.98 : x
  2. Step 2: Convert to fraction form
    20,615.10/28,450.22 = 11,662.98/x
  3. Step 3: Cross multiply
    20,615.10x = 28,450.22 × 11,662.98
  4. Step 4: Simplify right side
    20,615.10x = 331,814,288.54
  5. Step 5: Solve for x
    x = 331,814,288.54/20,615.10
  6. Step 6: Final answer
    x = 16,095.69

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1.5x scale

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.