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Finding the Fourth Proportional to 20,927.33, 28,879.91 and 11,495.88

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Solution

The fourth proportional to 20,927.33, 28,879.91 and 11,495.88 is: 15,864.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.33 : 28,879.91 = 11,495.88 : x
  2. Step 2: Convert to fraction form
    20,927.33/28,879.91 = 11,495.88/x
  3. Step 3: Cross multiply
    20,927.33x = 28,879.91 × 11,495.88
  4. Step 4: Simplify right side
    20,927.33x = 331,999,922.29
  5. Step 5: Solve for x
    x = 331,999,922.29/20,927.33
  6. Step 6: Final answer
    x = 15,864.42

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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.