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Finding the Fourth Proportional to 39,198.88, 54,093.88 and 21,294.12

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Solution

The fourth proportional to 39,198.88, 54,093.88 and 21,294.12 is: 29,385.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,198.88 : 54,093.88 = 21,294.12 : x
  2. Step 2: Convert to fraction form
    39,198.88/54,093.88 = 21,294.12/x
  3. Step 3: Cross multiply
    39,198.88x = 54,093.88 × 21,294.12
  4. Step 4: Simplify right side
    39,198.88x = 1,151,881,571.99
  5. Step 5: Solve for x
    x = 1,151,881,571.99/39,198.88
  6. Step 6: Final answer
    x = 29,385.57

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1.5x scale

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.