Home / 9,921.88-13,694.22-5,729.56

Finding the Fourth Proportional to 9,921.88, 13,694.22 and 5,729.56

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Solution

The fourth proportional to 9,921.88, 13,694.22 and 5,729.56 is: 7,907.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.88 : 13,694.22 = 5,729.56 : x
  2. Step 2: Convert to fraction form
    9,921.88/13,694.22 = 5,729.56/x
  3. Step 3: Cross multiply
    9,921.88x = 13,694.22 × 5,729.56
  4. Step 4: Simplify right side
    9,921.88x = 78,461,855.14
  5. Step 5: Solve for x
    x = 78,461,855.14/9,921.88
  6. Step 6: Final answer
    x = 7,907.96

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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.