Home / 31,335.75-43,238.03-20,719.71

Finding the Fourth Proportional to 31,335.75, 43,238.03 and 20,719.71

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Solution

The fourth proportional to 31,335.75, 43,238.03 and 20,719.71 is: 28,589.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,335.75 : 43,238.03 = 20,719.71 : x
  2. Step 2: Convert to fraction form
    31,335.75/43,238.03 = 20,719.71/x
  3. Step 3: Cross multiply
    31,335.75x = 43,238.03 × 20,719.71
  4. Step 4: Simplify right side
    31,335.75x = 895,879,338.97
  5. Step 5: Solve for x
    x = 895,879,338.97/31,335.75
  6. Step 6: Final answer
    x = 28,589.69

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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.