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Finding the Fourth Proportional to 39,338.89, 54,288.29 and 21,433.89

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Solution

The fourth proportional to 39,338.89, 54,288.29 and 21,433.89 is: 29,579.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,338.89 : 54,288.29 = 21,433.89 : x
  2. Step 2: Convert to fraction form
    39,338.89/54,288.29 = 21,433.89/x
  3. Step 3: Cross multiply
    39,338.89x = 54,288.29 × 21,433.89
  4. Step 4: Simplify right side
    39,338.89x = 1,163,609,236.15
  5. Step 5: Solve for x
    x = 1,163,609,236.15/39,338.89
  6. Step 6: Final answer
    x = 29,579.11

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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.