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Finding the Fourth Proportional to 8,321.55, 12,482.58 and 3,639.15

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Solution

The fourth proportional to 8,321.55, 12,482.58 and 3,639.15 is: 5,458.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.55 : 12,482.58 = 3,639.15 : x
  2. Step 2: Convert to fraction form
    8,321.55/12,482.58 = 3,639.15/x
  3. Step 3: Cross multiply
    8,321.55x = 12,482.58 × 3,639.15
  4. Step 4: Simplify right side
    8,321.55x = 45,425,994.65
  5. Step 5: Solve for x
    x = 45,425,994.65/8,321.55
  6. Step 6: Final answer
    x = 5,458.84

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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.