Home / 8,213.60-11,330.82-5,379.75

Finding the Fourth Proportional to 8,213.60, 11,330.82 and 5,379.75

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Solution

The fourth proportional to 8,213.60, 11,330.82 and 5,379.75 is: 7,421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,213.60 : 11,330.82 = 5,379.75 : x
  2. Step 2: Convert to fraction form
    8,213.60/11,330.82 = 5,379.75/x
  3. Step 3: Cross multiply
    8,213.60x = 11,330.82 × 5,379.75
  4. Step 4: Simplify right side
    8,213.60x = 60,956,978.90
  5. Step 5: Solve for x
    x = 60,956,978.90/8,213.60
  6. Step 6: Final answer
    x = 7,421.47

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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.