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Finding the Fourth Proportional to 8,315.22, 12,478.22 and 4,422.36

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Solution

The fourth proportional to 8,315.22, 12,478.22 and 4,422.36 is: 6,636.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.22 : 12,478.22 = 4,422.36 : x
  2. Step 2: Convert to fraction form
    8,315.22/12,478.22 = 4,422.36/x
  3. Step 3: Cross multiply
    8,315.22x = 12,478.22 × 4,422.36
  4. Step 4: Simplify right side
    8,315.22x = 55,183,181.00
  5. Step 5: Solve for x
    x = 55,183,181.00/8,315.22
  6. Step 6: Final answer
    x = 6,636.41

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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.