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Finding the Fourth Proportional to 20,657.97, 28,508.22 and 11,226.53

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Solution

The fourth proportional to 20,657.97, 28,508.22 and 11,226.53 is: 15,492.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.97 : 28,508.22 = 11,226.53 : x
  2. Step 2: Convert to fraction form
    20,657.97/28,508.22 = 11,226.53/x
  3. Step 3: Cross multiply
    20,657.97x = 28,508.22 × 11,226.53
  4. Step 4: Simplify right side
    20,657.97x = 320,048,458.35
  5. Step 5: Solve for x
    x = 320,048,458.35/20,657.97
  6. Step 6: Final answer
    x = 15,492.74

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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.