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Finding the Fourth Proportional to 31.93, 43.90 and 26.46

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Solution

The fourth proportional to 31.93, 43.90 and 26.46 is: 36.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.93 : 43.90 = 26.46 : x
  2. Step 2: Convert to fraction form
    31.93/43.90 = 26.46/x
  3. Step 3: Cross multiply
    31.93x = 43.90 × 26.46
  4. Step 4: Simplify right side
    31.93x = 1,161.53
  5. Step 5: Solve for x
    x = 1,161.53/31.93
  6. Step 6: Final answer
    x = 36.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.