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Finding the Fourth Proportional to 5,518.88, 8,278.82 and 1,821.12

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Solution

The fourth proportional to 5,518.88, 8,278.82 and 1,821.12 is: 2,731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.88 : 8,278.82 = 1,821.12 : x
  2. Step 2: Convert to fraction form
    5,518.88/8,278.82 = 1,821.12/x
  3. Step 3: Cross multiply
    5,518.88x = 8,278.82 × 1,821.12
  4. Step 4: Simplify right side
    5,518.88x = 15,076,724.68
  5. Step 5: Solve for x
    x = 15,076,724.68/5,518.88
  6. Step 6: Final answer
    x = 2,731.84

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Similar ratio
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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.