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Finding the Fourth Proportional to 20,295.43, 30,454.02 and 8,457.39

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Solution

The fourth proportional to 20,295.43, 30,454.02 and 8,457.39 is: 12,690.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.43 : 30,454.02 = 8,457.39 : x
  2. Step 2: Convert to fraction form
    20,295.43/30,454.02 = 8,457.39/x
  3. Step 3: Cross multiply
    20,295.43x = 30,454.02 × 8,457.39
  4. Step 4: Simplify right side
    20,295.43x = 257,561,524.21
  5. Step 5: Solve for x
    x = 257,561,524.21/20,295.43
  6. Step 6: Final answer
    x = 12,690.62

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.