Home / 21,976.91-30,329-12,418.91

Finding the Fourth Proportional to 21,976.91, 30,329 and 12,418.91

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Solution

The fourth proportional to 21,976.91, 30,329 and 12,418.91 is: 17,138.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.91 : 30,329 = 12,418.91 : x
  2. Step 2: Convert to fraction form
    21,976.91/30,329 = 12,418.91/x
  3. Step 3: Cross multiply
    21,976.91x = 30,329 × 12,418.91
  4. Step 4: Simplify right side
    21,976.91x = 376,653,121.39
  5. Step 5: Solve for x
    x = 376,653,121.39/21,976.91
  6. Step 6: Final answer
    x = 17,138.58

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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.