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Finding the Fourth Proportional to 39,182.99, 54,072.53 and 21,278

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Solution

The fourth proportional to 39,182.99, 54,072.53 and 21,278 is: 29,363.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,182.99 : 54,072.53 = 21,278 : x
  2. Step 2: Convert to fraction form
    39,182.99/54,072.53 = 21,278/x
  3. Step 3: Cross multiply
    39,182.99x = 54,072.53 × 21,278
  4. Step 4: Simplify right side
    39,182.99x = 1,150,555,293.34
  5. Step 5: Solve for x
    x = 1,150,555,293.34/39,182.99
  6. Step 6: Final answer
    x = 29,363.64

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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.