Home / 28,375.72-39,192.88-20,811.14

Finding the Fourth Proportional to 28,375.72, 39,192.88 and 20,811.14

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Solution

The fourth proportional to 28,375.72, 39,192.88 and 20,811.14 is: 28,744.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.72 : 39,192.88 = 20,811.14 : x
  2. Step 2: Convert to fraction form
    28,375.72/39,192.88 = 20,811.14/x
  3. Step 3: Cross multiply
    28,375.72x = 39,192.88 × 20,811.14
  4. Step 4: Simplify right side
    28,375.72x = 815,648,512.68
  5. Step 5: Solve for x
    x = 815,648,512.68/28,375.72
  6. Step 6: Final answer
    x = 28,744.59

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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.