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Finding the Fourth Proportional to 7,894.76, 11,833.90 and 3,212.89

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Solution

The fourth proportional to 7,894.76, 11,833.90 and 3,212.89 is: 4,815.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.76 : 11,833.90 = 3,212.89 : x
  2. Step 2: Convert to fraction form
    7,894.76/11,833.90 = 3,212.89/x
  3. Step 3: Cross multiply
    7,894.76x = 11,833.90 × 3,212.89
  4. Step 4: Simplify right side
    7,894.76x = 38,020,981.35
  5. Step 5: Solve for x
    x = 38,020,981.35/7,894.76
  6. Step 6: Final answer
    x = 4,815.98

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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.