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Finding the Fourth Proportional to 30,214.62, 41,711.32 and 18,890.40

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Solution

The fourth proportional to 30,214.62, 41,711.32 and 18,890.40 is: 26,078.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,214.62 : 41,711.32 = 18,890.40 : x
  2. Step 2: Convert to fraction form
    30,214.62/41,711.32 = 18,890.40/x
  3. Step 3: Cross multiply
    30,214.62x = 41,711.32 × 18,890.40
  4. Step 4: Simplify right side
    30,214.62x = 787,943,519.33
  5. Step 5: Solve for x
    x = 787,943,519.33/30,214.62
  6. Step 6: Final answer
    x = 26,078.22

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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.