Home / 8,172.24-12,260.88-2,978.88

Finding the Fourth Proportional to 8,172.24, 12,260.88 and 2,978.88

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Solution

The fourth proportional to 8,172.24, 12,260.88 and 2,978.88 is: 4,469.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,172.24 : 12,260.88 = 2,978.88 : x
  2. Step 2: Convert to fraction form
    8,172.24/12,260.88 = 2,978.88/x
  3. Step 3: Cross multiply
    8,172.24x = 12,260.88 × 2,978.88
  4. Step 4: Simplify right side
    8,172.24x = 36,523,690.21
  5. Step 5: Solve for x
    x = 36,523,690.21/8,172.24
  6. Step 6: Final answer
    x = 4,469.24

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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.