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Finding the Fourth Proportional to 8,505.80, 12,758.66 and 3,311.68

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Solution

The fourth proportional to 8,505.80, 12,758.66 and 3,311.68 is: 4,967.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.80 : 12,758.66 = 3,311.68 : x
  2. Step 2: Convert to fraction form
    8,505.80/12,758.66 = 3,311.68/x
  3. Step 3: Cross multiply
    8,505.80x = 12,758.66 × 3,311.68
  4. Step 4: Simplify right side
    8,505.80x = 42,252,599.15
  5. Step 5: Solve for x
    x = 42,252,599.15/8,505.80
  6. Step 6: Final answer
    x = 4,967.50

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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.