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Finding the Fourth Proportional to 39,145.41, 54,020.97 and 21,240.54

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Solution

The fourth proportional to 39,145.41, 54,020.97 and 21,240.54 is: 29,312.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,145.41 : 54,020.97 = 21,240.54 : x
  2. Step 2: Convert to fraction form
    39,145.41/54,020.97 = 21,240.54/x
  3. Step 3: Cross multiply
    39,145.41x = 54,020.97 × 21,240.54
  4. Step 4: Simplify right side
    39,145.41x = 1,147,434,574.12
  5. Step 5: Solve for x
    x = 1,147,434,574.12/39,145.41
  6. Step 6: Final answer
    x = 29,312.11

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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.