Home / 8,279.15-12,421.56-3,896.84

Finding the Fourth Proportional to 8,279.15, 12,421.56 and 3,896.84

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Solution

The fourth proportional to 8,279.15, 12,421.56 and 3,896.84 is: 5,846.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.15 : 12,421.56 = 3,896.84 : x
  2. Step 2: Convert to fraction form
    8,279.15/12,421.56 = 3,896.84/x
  3. Step 3: Cross multiply
    8,279.15x = 12,421.56 × 3,896.84
  4. Step 4: Simplify right side
    8,279.15x = 48,404,831.87
  5. Step 5: Solve for x
    x = 48,404,831.87/8,279.15
  6. Step 6: Final answer
    x = 5,846.59

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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.