Home / 21,908.97-30,234.38-12,478.41

Finding the Fourth Proportional to 21,908.97, 30,234.38 and 12,478.41

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Solution

The fourth proportional to 21,908.97, 30,234.38 and 12,478.41 is: 17,220.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.97 : 30,234.38 = 12,478.41 : x
  2. Step 2: Convert to fraction form
    21,908.97/30,234.38 = 12,478.41/x
  3. Step 3: Cross multiply
    21,908.97x = 30,234.38 × 12,478.41
  4. Step 4: Simplify right side
    21,908.97x = 377,276,920.75
  5. Step 5: Solve for x
    x = 377,276,920.75/21,908.97
  6. Step 6: Final answer
    x = 17,220.20

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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.