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Finding the Fourth Proportional to 7,893.92, 11,839.12 and 3,212.72

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Solution

The fourth proportional to 7,893.92, 11,839.12 and 3,212.72 is: 4,818.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,893.92 : 11,839.12 = 3,212.72 : x
  2. Step 2: Convert to fraction form
    7,893.92/11,839.12 = 3,212.72/x
  3. Step 3: Cross multiply
    7,893.92x = 11,839.12 × 3,212.72
  4. Step 4: Simplify right side
    7,893.92x = 38,035,777.61
  5. Step 5: Solve for x
    x = 38,035,777.61/7,893.92
  6. Step 6: Final answer
    x = 4,818.36

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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.