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Finding the Fourth Proportional to 20,737.55, 31,081.71 and 11,954.32

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Solution

The fourth proportional to 20,737.55, 31,081.71 and 11,954.32 is: 17,917.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,737.55 : 31,081.71 = 11,954.32 : x
  2. Step 2: Convert to fraction form
    20,737.55/31,081.71 = 11,954.32/x
  3. Step 3: Cross multiply
    20,737.55x = 31,081.71 × 11,954.32
  4. Step 4: Simplify right side
    20,737.55x = 371,560,707.49
  5. Step 5: Solve for x
    x = 371,560,707.49/20,737.55
  6. Step 6: Final answer
    x = 17,917.29

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.