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Finding the Fourth Proportional to 9,791.75, 13,512.60 and 5,315.47

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Solution

The fourth proportional to 9,791.75, 13,512.60 and 5,315.47 is: 7,335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,791.75 : 13,512.60 = 5,315.47 : x
  2. Step 2: Convert to fraction form
    9,791.75/13,512.60 = 5,315.47/x
  3. Step 3: Cross multiply
    9,791.75x = 13,512.60 × 5,315.47
  4. Step 4: Simplify right side
    9,791.75x = 71,825,819.92
  5. Step 5: Solve for x
    x = 71,825,819.92/9,791.75
  6. Step 6: Final answer
    x = 7,335.34

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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.