Home / 20,372.78-30,558.74-12,369.44

Finding the Fourth Proportional to 20,372.78, 30,558.74 and 12,369.44

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Solution

The fourth proportional to 20,372.78, 30,558.74 and 12,369.44 is: 18,553.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.78 : 30,558.74 = 12,369.44 : x
  2. Step 2: Convert to fraction form
    20,372.78/30,558.74 = 12,369.44/x
  3. Step 3: Cross multiply
    20,372.78x = 30,558.74 × 12,369.44
  4. Step 4: Simplify right side
    20,372.78x = 377,994,515.46
  5. Step 5: Solve for x
    x = 377,994,515.46/20,372.78
  6. Step 6: Final answer
    x = 18,553.90

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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.