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Finding the Fourth Proportional to 39,661.89, 54,734.94 and 21,757.65

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Solution

The fourth proportional to 39,661.89, 54,734.94 and 21,757.65 is: 30,026.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,661.89 : 54,734.94 = 21,757.65 : x
  2. Step 2: Convert to fraction form
    39,661.89/54,734.94 = 21,757.65/x
  3. Step 3: Cross multiply
    39,661.89x = 54,734.94 × 21,757.65
  4. Step 4: Simplify right side
    39,661.89x = 1,190,903,667.29
  5. Step 5: Solve for x
    x = 1,190,903,667.29/39,661.89
  6. Step 6: Final answer
    x = 30,026.40

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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.