Home / 31,393.85-43,293.78-20,619.76

Finding the Fourth Proportional to 31,393.85, 43,293.78 and 20,619.76

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Solution

The fourth proportional to 31,393.85, 43,293.78 and 20,619.76 is: 28,435.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,393.85 : 43,293.78 = 20,619.76 : x
  2. Step 2: Convert to fraction form
    31,393.85/43,293.78 = 20,619.76/x
  3. Step 3: Cross multiply
    31,393.85x = 43,293.78 × 20,619.76
  4. Step 4: Simplify right side
    31,393.85x = 892,707,353.09
  5. Step 5: Solve for x
    x = 892,707,353.09/31,393.85
  6. Step 6: Final answer
    x = 28,435.74

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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.