Home / 20,608.36-31,023.94-18,771.28

Finding the Fourth Proportional to 20,608.36, 31,023.94 and 18,771.28

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Solution

The fourth proportional to 20,608.36, 31,023.94 and 18,771.28 is: 28,258.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.36 : 31,023.94 = 18,771.28 : x
  2. Step 2: Convert to fraction form
    20,608.36/31,023.94 = 18,771.28/x
  3. Step 3: Cross multiply
    20,608.36x = 31,023.94 × 18,771.28
  4. Step 4: Simplify right side
    20,608.36x = 582,359,064.44
  5. Step 5: Solve for x
    x = 582,359,064.44/20,608.36
  6. Step 6: Final answer
    x = 28,258.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.