Home / 39,839.31-54,976.21-21,930.86

Finding the Fourth Proportional to 39,839.31, 54,976.21 and 21,930.86

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Solution

The fourth proportional to 39,839.31, 54,976.21 and 21,930.86 is: 30,263.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,839.31 : 54,976.21 = 21,930.86 : x
  2. Step 2: Convert to fraction form
    39,839.31/54,976.21 = 21,930.86/x
  3. Step 3: Cross multiply
    39,839.31x = 54,976.21 × 21,930.86
  4. Step 4: Simplify right side
    39,839.31x = 1,205,675,647.45
  5. Step 5: Solve for x
    x = 1,205,675,647.45/39,839.31
  6. Step 6: Final answer
    x = 30,263.47

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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.