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Finding the Fourth Proportional to 8,220.65, 11,348.19 and 5,240.48

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Solution

The fourth proportional to 8,220.65, 11,348.19 and 5,240.48 is: 7,234.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.65 : 11,348.19 = 5,240.48 : x
  2. Step 2: Convert to fraction form
    8,220.65/11,348.19 = 5,240.48/x
  3. Step 3: Cross multiply
    8,220.65x = 11,348.19 × 5,240.48
  4. Step 4: Simplify right side
    8,220.65x = 59,469,905.99
  5. Step 5: Solve for x
    x = 59,469,905.99/8,220.65
  6. Step 6: Final answer
    x = 7,234.21

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Half scale
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Double scale
Find fourth proportional to 8,221.65, 11,349.57 and 5,241.48
Similar ratio
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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.