Home / 18,821.98-28,229.88-6,981.34

Finding the Fourth Proportional to 18,821.98, 28,229.88 and 6,981.34

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Solution

The fourth proportional to 18,821.98, 28,229.88 and 6,981.34 is: 10,470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.98 : 28,229.88 = 6,981.34 : x
  2. Step 2: Convert to fraction form
    18,821.98/28,229.88 = 6,981.34/x
  3. Step 3: Cross multiply
    18,821.98x = 28,229.88 × 6,981.34
  4. Step 4: Simplify right side
    18,821.98x = 197,082,390.44
  5. Step 5: Solve for x
    x = 197,082,390.44/18,821.98
  6. Step 6: Final answer
    x = 10,470.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.