Home / 20,850.21-31,265.60-12,087.63

Finding the Fourth Proportional to 20,850.21, 31,265.60 and 12,087.63

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Solution

The fourth proportional to 20,850.21, 31,265.60 and 12,087.63 is: 18,125.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.21 : 31,265.60 = 12,087.63 : x
  2. Step 2: Convert to fraction form
    20,850.21/31,265.60 = 12,087.63/x
  3. Step 3: Cross multiply
    20,850.21x = 31,265.60 × 12,087.63
  4. Step 4: Simplify right side
    20,850.21x = 377,926,944.09
  5. Step 5: Solve for x
    x = 377,926,944.09/20,850.21
  6. Step 6: Final answer
    x = 18,125.81

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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.