Home / 20,123.20-27,765.72-12,163.84

Finding the Fourth Proportional to 20,123.20, 27,765.72 and 12,163.84

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Solution

The fourth proportional to 20,123.20, 27,765.72 and 12,163.84 is: 16,783.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.20 : 27,765.72 = 12,163.84 : x
  2. Step 2: Convert to fraction form
    20,123.20/27,765.72 = 12,163.84/x
  3. Step 3: Cross multiply
    20,123.20x = 27,765.72 × 12,163.84
  4. Step 4: Simplify right side
    20,123.20x = 337,737,775.56
  5. Step 5: Solve for x
    x = 337,737,775.56/20,123.20
  6. Step 6: Final answer
    x = 16,783.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.