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Finding the Fourth Proportional to 9,791.56, 13,512.12 and 5,315.12

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Solution

The fourth proportional to 9,791.56, 13,512.12 and 5,315.12 is: 7,334.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,791.56 : 13,512.12 = 5,315.12 : x
  2. Step 2: Convert to fraction form
    9,791.56/13,512.12 = 5,315.12/x
  3. Step 3: Cross multiply
    9,791.56x = 13,512.12 × 5,315.12
  4. Step 4: Simplify right side
    9,791.56x = 71,818,539.25
  5. Step 5: Solve for x
    x = 71,818,539.25/9,791.56
  6. Step 6: Final answer
    x = 7,334.74

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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.