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Finding the Fourth Proportional to 31.90, 44 and 18.96

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Solution

The fourth proportional to 31.90, 44 and 18.96 is: 26.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.90 : 44 = 18.96 : x
  2. Step 2: Convert to fraction form
    31.90/44 = 18.96/x
  3. Step 3: Cross multiply
    31.90x = 44 × 18.96
  4. Step 4: Simplify right side
    31.90x = 834.24
  5. Step 5: Solve for x
    x = 834.24/31.90
  6. Step 6: Final answer
    x = 26.15

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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.