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Finding the Fourth Proportional to 7,819.91, 10,791.50 and 4,283.12

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Solution

The fourth proportional to 7,819.91, 10,791.50 and 4,283.12 is: 5,910.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.91 : 10,791.50 = 4,283.12 : x
  2. Step 2: Convert to fraction form
    7,819.91/10,791.50 = 4,283.12/x
  3. Step 3: Cross multiply
    7,819.91x = 10,791.50 × 4,283.12
  4. Step 4: Simplify right side
    7,819.91x = 46,221,214.11
  5. Step 5: Solve for x
    x = 46,221,214.11/7,819.91
  6. Step 6: Final answer
    x = 5,910.71

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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.