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Finding the Fourth Proportional to 8,684.64, 12,994.44 and 5,161.80

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Solution

The fourth proportional to 8,684.64, 12,994.44 and 5,161.80 is: 7,723.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,684.64 : 12,994.44 = 5,161.80 : x
  2. Step 2: Convert to fraction form
    8,684.64/12,994.44 = 5,161.80/x
  3. Step 3: Cross multiply
    8,684.64x = 12,994.44 × 5,161.80
  4. Step 4: Simplify right side
    8,684.64x = 67,074,700.39
  5. Step 5: Solve for x
    x = 67,074,700.39/8,684.64
  6. Step 6: Final answer
    x = 7,723.37

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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.