Home / 39,740.97-54,845.88-21,839.55

Finding the Fourth Proportional to 39,740.97, 54,845.88 and 21,839.55

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Solution

The fourth proportional to 39,740.97, 54,845.88 and 21,839.55 is: 30,140.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,740.97 : 54,845.88 = 21,839.55 : x
  2. Step 2: Convert to fraction form
    39,740.97/54,845.88 = 21,839.55/x
  3. Step 3: Cross multiply
    39,740.97x = 54,845.88 × 21,839.55
  4. Step 4: Simplify right side
    39,740.97x = 1,197,809,338.55
  5. Step 5: Solve for x
    x = 1,197,809,338.55/39,740.97
  6. Step 6: Final answer
    x = 30,140.42

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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.