Home / 28,811.75-39,771.15-19,385.78

Finding the Fourth Proportional to 28,811.75, 39,771.15 and 19,385.78

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Solution

The fourth proportional to 28,811.75, 39,771.15 and 19,385.78 is: 26,759.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,811.75 : 39,771.15 = 19,385.78 : x
  2. Step 2: Convert to fraction form
    28,811.75/39,771.15 = 19,385.78/x
  3. Step 3: Cross multiply
    28,811.75x = 39,771.15 × 19,385.78
  4. Step 4: Simplify right side
    28,811.75x = 770,994,764.25
  5. Step 5: Solve for x
    x = 770,994,764.25/28,811.75
  6. Step 6: Final answer
    x = 26,759.73

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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.