Home / 31,480.22-43,432.94-20,858.70

Finding the Fourth Proportional to 31,480.22, 43,432.94 and 20,858.70

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Solution

The fourth proportional to 31,480.22, 43,432.94 and 20,858.70 is: 28,778.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,480.22 : 43,432.94 = 20,858.70 : x
  2. Step 2: Convert to fraction form
    31,480.22/43,432.94 = 20,858.70/x
  3. Step 3: Cross multiply
    31,480.22x = 43,432.94 × 20,858.70
  4. Step 4: Simplify right side
    31,480.22x = 905,954,665.58
  5. Step 5: Solve for x
    x = 905,954,665.58/31,480.22
  6. Step 6: Final answer
    x = 28,778.54

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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.