Home / 20,850.75-28,774.04-11,419.65

Finding the Fourth Proportional to 20,850.75, 28,774.04 and 11,419.65

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Solution

The fourth proportional to 20,850.75, 28,774.04 and 11,419.65 is: 15,759.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.75 : 28,774.04 = 11,419.65 : x
  2. Step 2: Convert to fraction form
    20,850.75/28,774.04 = 11,419.65/x
  3. Step 3: Cross multiply
    20,850.75x = 28,774.04 × 11,419.65
  4. Step 4: Simplify right side
    20,850.75x = 328,589,408.79
  5. Step 5: Solve for x
    x = 328,589,408.79/20,850.75
  6. Step 6: Final answer
    x = 15,759.12

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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.