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Finding the Fourth Proportional to 20,467.89, 30,699.41 and 12,039.44

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Solution

The fourth proportional to 20,467.89, 30,699.41 and 12,039.44 is: 18,057.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,467.89 : 30,699.41 = 12,039.44 : x
  2. Step 2: Convert to fraction form
    20,467.89/30,699.41 = 12,039.44/x
  3. Step 3: Cross multiply
    20,467.89x = 30,699.41 × 12,039.44
  4. Step 4: Simplify right side
    20,467.89x = 369,603,491.04
  5. Step 5: Solve for x
    x = 369,603,491.04/20,467.89
  6. Step 6: Final answer
    x = 18,057.72

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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.