Home / 31,863.66-43,930.53-20,512.86

Finding the Fourth Proportional to 31,863.66, 43,930.53 and 20,512.86

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Solution

The fourth proportional to 31,863.66, 43,930.53 and 20,512.86 is: 28,281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,863.66 : 43,930.53 = 20,512.86 : x
  2. Step 2: Convert to fraction form
    31,863.66/43,930.53 = 20,512.86/x
  3. Step 3: Cross multiply
    31,863.66x = 43,930.53 × 20,512.86
  4. Step 4: Simplify right side
    31,863.66x = 901,140,811.62
  5. Step 5: Solve for x
    x = 901,140,811.62/31,863.66
  6. Step 6: Final answer
    x = 28,281.15

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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.