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Finding the Fourth Proportional to 12,651.85, 18,977.73 and 4,855.20

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Solution

The fourth proportional to 12,651.85, 18,977.73 and 4,855.20 is: 7,282.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.85 : 18,977.73 = 4,855.20 : x
  2. Step 2: Convert to fraction form
    12,651.85/18,977.73 = 4,855.20/x
  3. Step 3: Cross multiply
    12,651.85x = 18,977.73 × 4,855.20
  4. Step 4: Simplify right side
    12,651.85x = 92,140,674.70
  5. Step 5: Solve for x
    x = 92,140,674.70/12,651.85
  6. Step 6: Final answer
    x = 7,282.78

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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.