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Finding the Fourth Proportional to 6,172.76, 8,518.20 and 3,378.20

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Solution

The fourth proportional to 6,172.76, 8,518.20 and 3,378.20 is: 4,661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,172.76 : 8,518.20 = 3,378.20 : x
  2. Step 2: Convert to fraction form
    6,172.76/8,518.20 = 3,378.20/x
  3. Step 3: Cross multiply
    6,172.76x = 8,518.20 × 3,378.20
  4. Step 4: Simplify right side
    6,172.76x = 28,776,183.24
  5. Step 5: Solve for x
    x = 28,776,183.24/6,172.76
  6. Step 6: Final answer
    x = 4,661.80

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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.