Home / 31,738.14-43,778.72-20,422.35

Finding the Fourth Proportional to 31,738.14, 43,778.72 and 20,422.35

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Solution

The fourth proportional to 31,738.14, 43,778.72 and 20,422.35 is: 28,170.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,738.14 : 43,778.72 = 20,422.35 : x
  2. Step 2: Convert to fraction form
    31,738.14/43,778.72 = 20,422.35/x
  3. Step 3: Cross multiply
    31,738.14x = 43,778.72 × 20,422.35
  4. Step 4: Simplify right side
    31,738.14x = 894,064,240.28
  5. Step 5: Solve for x
    x = 894,064,240.28/31,738.14
  6. Step 6: Final answer
    x = 28,170.03

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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.