Home / 31,311.70-43,231.53-21,883.30

Finding the Fourth Proportional to 31,311.70, 43,231.53 and 21,883.30

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Solution

The fourth proportional to 31,311.70, 43,231.53 and 21,883.30 is: 30,213.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,311.70 : 43,231.53 = 21,883.30 : x
  2. Step 2: Convert to fraction form
    31,311.70/43,231.53 = 21,883.30/x
  3. Step 3: Cross multiply
    31,311.70x = 43,231.53 × 21,883.30
  4. Step 4: Simplify right side
    31,311.70x = 946,048,540.45
  5. Step 5: Solve for x
    x = 946,048,540.45/31,311.70
  6. Step 6: Final answer
    x = 30,213.90

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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.