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Finding the Fourth Proportional to 8,279.62, 12,419.43 and 4,814.44

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Solution

The fourth proportional to 8,279.62, 12,419.43 and 4,814.44 is: 7,221.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.62 : 12,419.43 = 4,814.44 : x
  2. Step 2: Convert to fraction form
    8,279.62/12,419.43 = 4,814.44/x
  3. Step 3: Cross multiply
    8,279.62x = 12,419.43 × 4,814.44
  4. Step 4: Simplify right side
    8,279.62x = 59,792,551.47
  5. Step 5: Solve for x
    x = 59,792,551.47/8,279.62
  6. Step 6: Final answer
    x = 7,221.66

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Double scale
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Similar ratio
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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.