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Finding the Fourth Proportional to 7,819.74, 10,791.21 and 4,282.92

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Solution

The fourth proportional to 7,819.74, 10,791.21 and 4,282.92 is: 5,910.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.74 : 10,791.21 = 4,282.92 : x
  2. Step 2: Convert to fraction form
    7,819.74/10,791.21 = 4,282.92/x
  3. Step 3: Cross multiply
    7,819.74x = 10,791.21 × 4,282.92
  4. Step 4: Simplify right side
    7,819.74x = 46,217,889.13
  5. Step 5: Solve for x
    x = 46,217,889.13/7,819.74
  6. Step 6: Final answer
    x = 5,910.41

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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.