Home / 31,738.64-43,779.42-20,422.84

Finding the Fourth Proportional to 31,738.64, 43,779.42 and 20,422.84

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Solution

The fourth proportional to 31,738.64, 43,779.42 and 20,422.84 is: 28,170.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,738.64 : 43,779.42 = 20,422.84 : x
  2. Step 2: Convert to fraction form
    31,738.64/43,779.42 = 20,422.84/x
  3. Step 3: Cross multiply
    31,738.64x = 43,779.42 × 20,422.84
  4. Step 4: Simplify right side
    31,738.64x = 894,100,089.95
  5. Step 5: Solve for x
    x = 894,100,089.95/31,738.64
  6. Step 6: Final answer
    x = 28,170.71

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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.