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Finding the Fourth Proportional to 20,405.63, 30,608.45 and 8,093.63

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Solution

The fourth proportional to 20,405.63, 30,608.45 and 8,093.63 is: 12,140.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.63 : 30,608.45 = 8,093.63 : x
  2. Step 2: Convert to fraction form
    20,405.63/30,608.45 = 8,093.63/x
  3. Step 3: Cross multiply
    20,405.63x = 30,608.45 × 8,093.63
  4. Step 4: Simplify right side
    20,405.63x = 247,733,275.66
  5. Step 5: Solve for x
    x = 247,733,275.66/20,405.63
  6. Step 6: Final answer
    x = 12,140.44

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1.5x scale

Why These Related Problems?

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