Home / 39,744.78-54,847.76-21,839.75

Finding the Fourth Proportional to 39,744.78, 54,847.76 and 21,839.75

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Solution

The fourth proportional to 39,744.78, 54,847.76 and 21,839.75 is: 30,138.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,744.78 : 54,847.76 = 21,839.75 : x
  2. Step 2: Convert to fraction form
    39,744.78/54,847.76 = 21,839.75/x
  3. Step 3: Cross multiply
    39,744.78x = 54,847.76 × 21,839.75
  4. Step 4: Simplify right side
    39,744.78x = 1,197,861,366.46
  5. Step 5: Solve for x
    x = 1,197,861,366.46/39,744.78
  6. Step 6: Final answer
    x = 30,138.83

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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.