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Finding the Fourth Proportional to 31.88, 44 and 22.68

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Solution

The fourth proportional to 31.88, 44 and 22.68 is: 31.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.88 : 44 = 22.68 : x
  2. Step 2: Convert to fraction form
    31.88/44 = 22.68/x
  3. Step 3: Cross multiply
    31.88x = 44 × 22.68
  4. Step 4: Simplify right side
    31.88x = 997.92
  5. Step 5: Solve for x
    x = 997.92/31.88
  6. Step 6: Final answer
    x = 31.30

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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.