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Finding the Fourth Proportional to 20,469, 28,247.22 and 11,637

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Solution

The fourth proportional to 20,469, 28,247.22 and 11,637 is: 16,059.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,469 : 28,247.22 = 11,637 : x
  2. Step 2: Convert to fraction form
    20,469/28,247.22 = 11,637/x
  3. Step 3: Cross multiply
    20,469x = 28,247.22 × 11,637
  4. Step 4: Simplify right side
    20,469x = 328,712,899.14
  5. Step 5: Solve for x
    x = 328,712,899.14/20,469
  6. Step 6: Final answer
    x = 16,059.06

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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.