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Finding the Fourth Proportional to 8,480, 12,725.40 and 3,863

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Solution

The fourth proportional to 8,480, 12,725.40 and 3,863 is: 5,796.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480 : 12,725.40 = 3,863 : x
  2. Step 2: Convert to fraction form
    8,480/12,725.40 = 3,863/x
  3. Step 3: Cross multiply
    8,480x = 12,725.40 × 3,863
  4. Step 4: Simplify right side
    8,480x = 49,158,220.20
  5. Step 5: Solve for x
    x = 49,158,220.20/8,480
  6. Step 6: Final answer
    x = 5,796.96

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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.