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Finding the Fourth Proportional to 8,378.70, 12,568.07 and 2,830.56

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Solution

The fourth proportional to 8,378.70, 12,568.07 and 2,830.56 is: 4,245.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.70 : 12,568.07 = 2,830.56 : x
  2. Step 2: Convert to fraction form
    8,378.70/12,568.07 = 2,830.56/x
  3. Step 3: Cross multiply
    8,378.70x = 12,568.07 × 2,830.56
  4. Step 4: Simplify right side
    8,378.70x = 35,574,599.23
  5. Step 5: Solve for x
    x = 35,574,599.23/8,378.70
  6. Step 6: Final answer
    x = 4,245.84

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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.