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Finding the Fourth Proportional to 20,927.03, 28,879.52 and 11,367.01

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Solution

The fourth proportional to 20,927.03, 28,879.52 and 11,367.01 is: 15,686.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.03 : 28,879.52 = 11,367.01 : x
  2. Step 2: Convert to fraction form
    20,927.03/28,879.52 = 11,367.01/x
  3. Step 3: Cross multiply
    20,927.03x = 28,879.52 × 11,367.01
  4. Step 4: Simplify right side
    20,927.03x = 328,273,735.80
  5. Step 5: Solve for x
    x = 328,273,735.80/20,927.03
  6. Step 6: Final answer
    x = 15,686.59

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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.