Home / 31,615-43,629.30-20,456.44

Finding the Fourth Proportional to 31,615, 43,629.30 and 20,456.44

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Solution

The fourth proportional to 31,615, 43,629.30 and 20,456.44 is: 28,230.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,615 : 43,629.30 = 20,456.44 : x
  2. Step 2: Convert to fraction form
    31,615/43,629.30 = 20,456.44/x
  3. Step 3: Cross multiply
    31,615x = 43,629.30 × 20,456.44
  4. Step 4: Simplify right side
    31,615x = 892,500,157.69
  5. Step 5: Solve for x
    x = 892,500,157.69/31,615
  6. Step 6: Final answer
    x = 28,230.28

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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.