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Finding the Fourth Proportional to 20,657.94, 28,506.80 and 11,226.44

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Solution

The fourth proportional to 20,657.94, 28,506.80 and 11,226.44 is: 15,491.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.94 : 28,506.80 = 11,226.44 : x
  2. Step 2: Convert to fraction form
    20,657.94/28,506.80 = 11,226.44/x
  3. Step 3: Cross multiply
    20,657.94x = 28,506.80 × 11,226.44
  4. Step 4: Simplify right side
    20,657.94x = 320,029,879.79
  5. Step 5: Solve for x
    x = 320,029,879.79/20,657.94
  6. Step 6: Final answer
    x = 15,491.86

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.