Home / 20,438.20-30,658.74-5,645.98

Finding the Fourth Proportional to 20,438.20, 30,658.74 and 5,645.98

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Solution

The fourth proportional to 20,438.20, 30,658.74 and 5,645.98 is: 8,469.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.20 : 30,658.74 = 5,645.98 : x
  2. Step 2: Convert to fraction form
    20,438.20/30,658.74 = 5,645.98/x
  3. Step 3: Cross multiply
    20,438.20x = 30,658.74 × 5,645.98
  4. Step 4: Simplify right side
    20,438.20x = 173,098,632.87
  5. Step 5: Solve for x
    x = 173,098,632.87/20,438.20
  6. Step 6: Final answer
    x = 8,469.37

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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.