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Finding the Fourth Proportional to 39,662.87, 54,734.54 and 21,757.41

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Solution

The fourth proportional to 39,662.87, 54,734.54 and 21,757.41 is: 30,025.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,662.87 : 54,734.54 = 21,757.41 : x
  2. Step 2: Convert to fraction form
    39,662.87/54,734.54 = 21,757.41/x
  3. Step 3: Cross multiply
    39,662.87x = 54,734.54 × 21,757.41
  4. Step 4: Simplify right side
    39,662.87x = 1,190,881,719.15
  5. Step 5: Solve for x
    x = 1,190,881,719.15/39,662.87
  6. Step 6: Final answer
    x = 30,025.11

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Why These Related Problems?

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