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Finding the Fourth Proportional to 8,114.10, 12,171.15 and 2,919.30

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Solution

The fourth proportional to 8,114.10, 12,171.15 and 2,919.30 is: 4,378.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,114.10 : 12,171.15 = 2,919.30 : x
  2. Step 2: Convert to fraction form
    8,114.10/12,171.15 = 2,919.30/x
  3. Step 3: Cross multiply
    8,114.10x = 12,171.15 × 2,919.30
  4. Step 4: Simplify right side
    8,114.10x = 35,531,238.20
  5. Step 5: Solve for x
    x = 35,531,238.20/8,114.10
  6. Step 6: Final answer
    x = 4,378.95

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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.