Home / 8,279.82-12,421.53-4,122.09

Finding the Fourth Proportional to 8,279.82, 12,421.53 and 4,122.09

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Solution

The fourth proportional to 8,279.82, 12,421.53 and 4,122.09 is: 6,184.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.82 : 12,421.53 = 4,122.09 : x
  2. Step 2: Convert to fraction form
    8,279.82/12,421.53 = 4,122.09/x
  3. Step 3: Cross multiply
    8,279.82x = 12,421.53 × 4,122.09
  4. Step 4: Simplify right side
    8,279.82x = 51,202,664.60
  5. Step 5: Solve for x
    x = 51,202,664.60/8,279.82
  6. Step 6: Final answer
    x = 6,184.03

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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.