Home / 18,771.64-28,193.91-13,821.73

Finding the Fourth Proportional to 18,771.64, 28,193.91 and 13,821.73

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Solution

The fourth proportional to 18,771.64, 28,193.91 and 13,821.73 is: 20,759.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.64 : 28,193.91 = 13,821.73 : x
  2. Step 2: Convert to fraction form
    18,771.64/28,193.91 = 13,821.73/x
  3. Step 3: Cross multiply
    18,771.64x = 28,193.91 × 13,821.73
  4. Step 4: Simplify right side
    18,771.64x = 389,688,611.66
  5. Step 5: Solve for x
    x = 389,688,611.66/18,771.64
  6. Step 6: Final answer
    x = 20,759.43

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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.