Home / 21,976.77-30,329.80-12,418.41

Finding the Fourth Proportional to 21,976.77, 30,329.80 and 12,418.41

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Solution

The fourth proportional to 21,976.77, 30,329.80 and 12,418.41 is: 17,138.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.77 : 30,329.80 = 12,418.41 : x
  2. Step 2: Convert to fraction form
    21,976.77/30,329.80 = 12,418.41/x
  3. Step 3: Cross multiply
    21,976.77x = 30,329.80 × 12,418.41
  4. Step 4: Simplify right side
    21,976.77x = 376,647,891.62
  5. Step 5: Solve for x
    x = 376,647,891.62/21,976.77
  6. Step 6: Final answer
    x = 17,138.46

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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.