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Finding the Fourth Proportional to 9,119.88, 13,679.88 and 7,883.64

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Solution

The fourth proportional to 9,119.88, 13,679.88 and 7,883.64 is: 11,825.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,119.88 : 13,679.88 = 7,883.64 : x
  2. Step 2: Convert to fraction form
    9,119.88/13,679.88 = 7,883.64/x
  3. Step 3: Cross multiply
    9,119.88x = 13,679.88 × 7,883.64
  4. Step 4: Simplify right side
    9,119.88x = 107,847,249.16
  5. Step 5: Solve for x
    x = 107,847,249.16/9,119.88
  6. Step 6: Final answer
    x = 11,825.51

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1.5x scale

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.