Home / 20,123.82-30,170.70-12,228.12

Finding the Fourth Proportional to 20,123.82, 30,170.70 and 12,228.12

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Solution

The fourth proportional to 20,123.82, 30,170.70 and 12,228.12 is: 18,333.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.82 : 30,170.70 = 12,228.12 : x
  2. Step 2: Convert to fraction form
    20,123.82/30,170.70 = 12,228.12/x
  3. Step 3: Cross multiply
    20,123.82x = 30,170.70 × 12,228.12
  4. Step 4: Simplify right side
    20,123.82x = 368,930,940.08
  5. Step 5: Solve for x
    x = 368,930,940.08/20,123.82
  6. Step 6: Final answer
    x = 18,333.05

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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.