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Finding the Fourth Proportional to 6,216.65, 8,578.98 and 3,422.15

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Solution

The fourth proportional to 6,216.65, 8,578.98 and 3,422.15 is: 4,722.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,216.65 : 8,578.98 = 3,422.15 : x
  2. Step 2: Convert to fraction form
    6,216.65/8,578.98 = 3,422.15/x
  3. Step 3: Cross multiply
    6,216.65x = 8,578.98 × 3,422.15
  4. Step 4: Simplify right side
    6,216.65x = 29,358,556.41
  5. Step 5: Solve for x
    x = 29,358,556.41/6,216.65
  6. Step 6: Final answer
    x = 4,722.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.