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Finding the Fourth Proportional to 8,436.33, 12,662.22 and 4,279.21

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Solution

The fourth proportional to 8,436.33, 12,662.22 and 4,279.21 is: 6,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,436.33 : 12,662.22 = 4,279.21 : x
  2. Step 2: Convert to fraction form
    8,436.33/12,662.22 = 4,279.21/x
  3. Step 3: Cross multiply
    8,436.33x = 12,662.22 × 4,279.21
  4. Step 4: Simplify right side
    8,436.33x = 54,184,298.45
  5. Step 5: Solve for x
    x = 54,184,298.45/8,436.33
  6. Step 6: Final answer
    x = 6,422.73

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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.