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Finding the Fourth Proportional to 8,215.75, 11,337.74 and 4,489.75

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Solution

The fourth proportional to 8,215.75, 11,337.74 and 4,489.75 is: 6,195.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.75 : 11,337.74 = 4,489.75 : x
  2. Step 2: Convert to fraction form
    8,215.75/11,337.74 = 4,489.75/x
  3. Step 3: Cross multiply
    8,215.75x = 11,337.74 × 4,489.75
  4. Step 4: Simplify right side
    8,215.75x = 50,903,618.17
  5. Step 5: Solve for x
    x = 50,903,618.17/8,215.75
  6. Step 6: Final answer
    x = 6,195.86

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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.