Home / 20,860.08-31,286.32-8,379.60

Finding the Fourth Proportional to 20,860.08, 31,286.32 and 8,379.60

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Solution

The fourth proportional to 20,860.08, 31,286.32 and 8,379.60 is: 12,567.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.08 : 31,286.32 = 8,379.60 : x
  2. Step 2: Convert to fraction form
    20,860.08/31,286.32 = 8,379.60/x
  3. Step 3: Cross multiply
    20,860.08x = 31,286.32 × 8,379.60
  4. Step 4: Simplify right side
    20,860.08x = 262,166,847.07
  5. Step 5: Solve for x
    x = 262,166,847.07/20,860.08
  6. Step 6: Final answer
    x = 12,567.87

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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.