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Finding the Fourth Proportional to 12,800.25, 17,664.62 and 7,211.25

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Solution

The fourth proportional to 12,800.25, 17,664.62 and 7,211.25 is: 9,951.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,800.25 : 17,664.62 = 7,211.25 : x
  2. Step 2: Convert to fraction form
    12,800.25/17,664.62 = 7,211.25/x
  3. Step 3: Cross multiply
    12,800.25x = 17,664.62 × 7,211.25
  4. Step 4: Simplify right side
    12,800.25x = 127,383,954.92
  5. Step 5: Solve for x
    x = 127,383,954.92/12,800.25
  6. Step 6: Final answer
    x = 9,951.68

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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.