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Finding the Fourth Proportional to 39,800.40, 54,923.94 and 21,894.30

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Solution

The fourth proportional to 39,800.40, 54,923.94 and 21,894.30 is: 30,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,800.40 : 54,923.94 = 21,894.30 : x
  2. Step 2: Convert to fraction form
    39,800.40/54,923.94 = 21,894.30/x
  3. Step 3: Cross multiply
    39,800.40x = 54,923.94 × 21,894.30
  4. Step 4: Simplify right side
    39,800.40x = 1,202,521,219.54
  5. Step 5: Solve for x
    x = 1,202,521,219.54/39,800.40
  6. Step 6: Final answer
    x = 30,213.80

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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.