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Finding the Fourth Proportional to 31,536.54, 43,512.66 and 20,780.22

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Solution

The fourth proportional to 31,536.54, 43,512.66 and 20,780.22 is: 28,671.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,536.54 : 43,512.66 = 20,780.22 : x
  2. Step 2: Convert to fraction form
    31,536.54/43,512.66 = 20,780.22/x
  3. Step 3: Cross multiply
    31,536.54x = 43,512.66 × 20,780.22
  4. Step 4: Simplify right side
    31,536.54x = 904,202,647.59
  5. Step 5: Solve for x
    x = 904,202,647.59/31,536.54
  6. Step 6: Final answer
    x = 28,671.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.