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Finding the Fourth Proportional to 20,799.26, 28,703.02 and 11,367.80

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Solution

The fourth proportional to 20,799.26, 28,703.02 and 11,367.80 is: 15,687.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.26 : 28,703.02 = 11,367.80 : x
  2. Step 2: Convert to fraction form
    20,799.26/28,703.02 = 11,367.80/x
  3. Step 3: Cross multiply
    20,799.26x = 28,703.02 × 11,367.80
  4. Step 4: Simplify right side
    20,799.26x = 326,290,190.76
  5. Step 5: Solve for x
    x = 326,290,190.76/20,799.26
  6. Step 6: Final answer
    x = 15,687.59

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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.