Home / 20,393.54-28,143.94-11,440.80

Finding the Fourth Proportional to 20,393.54, 28,143.94 and 11,440.80

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Solution

The fourth proportional to 20,393.54, 28,143.94 and 11,440.80 is: 15,788.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.54 : 28,143.94 = 11,440.80 : x
  2. Step 2: Convert to fraction form
    20,393.54/28,143.94 = 11,440.80/x
  3. Step 3: Cross multiply
    20,393.54x = 28,143.94 × 11,440.80
  4. Step 4: Simplify right side
    20,393.54x = 321,989,188.75
  5. Step 5: Solve for x
    x = 321,989,188.75/20,393.54
  6. Step 6: Final answer
    x = 15,788.78

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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.