Home / 20,394.88-28,145-11,902.84

Finding the Fourth Proportional to 20,394.88, 28,145 and 11,902.84

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Solution

The fourth proportional to 20,394.88, 28,145 and 11,902.84 is: 16,425.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.88 : 28,145 = 11,902.84 : x
  2. Step 2: Convert to fraction form
    20,394.88/28,145 = 11,902.84/x
  3. Step 3: Cross multiply
    20,394.88x = 28,145 × 11,902.84
  4. Step 4: Simplify right side
    20,394.88x = 335,005,431.80
  5. Step 5: Solve for x
    x = 335,005,431.80/20,394.88
  6. Step 6: Final answer
    x = 16,425.96

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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.