Home / 31,723.20-43,758.20-20,407.46

Finding the Fourth Proportional to 31,723.20, 43,758.20 and 20,407.46

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Solution

The fourth proportional to 31,723.20, 43,758.20 and 20,407.46 is: 28,149.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,723.20 : 43,758.20 = 20,407.46 : x
  2. Step 2: Convert to fraction form
    31,723.20/43,758.20 = 20,407.46/x
  3. Step 3: Cross multiply
    31,723.20x = 43,758.20 × 20,407.46
  4. Step 4: Simplify right side
    31,723.20x = 892,993,395.34
  5. Step 5: Solve for x
    x = 892,993,395.34/31,723.20
  6. Step 6: Final answer
    x = 28,149.54

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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.