Home / 31,393.40-43,334.26-20,786.45

Finding the Fourth Proportional to 31,393.40, 43,334.26 and 20,786.45

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Solution

The fourth proportional to 31,393.40, 43,334.26 and 20,786.45 is: 28,692.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,393.40 : 43,334.26 = 20,786.45 : x
  2. Step 2: Convert to fraction form
    31,393.40/43,334.26 = 20,786.45/x
  3. Step 3: Cross multiply
    31,393.40x = 43,334.26 × 20,786.45
  4. Step 4: Simplify right side
    31,393.40x = 900,765,428.78
  5. Step 5: Solve for x
    x = 900,765,428.78/31,393.40
  6. Step 6: Final answer
    x = 28,692.83

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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.