Home / 13,729.44-18,949.12-7,761.09

Finding the Fourth Proportional to 13,729.44, 18,949.12 and 7,761.09

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Solution

The fourth proportional to 13,729.44, 18,949.12 and 7,761.09 is: 10,711.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.44 : 18,949.12 = 7,761.09 : x
  2. Step 2: Convert to fraction form
    13,729.44/18,949.12 = 7,761.09/x
  3. Step 3: Cross multiply
    13,729.44x = 18,949.12 × 7,761.09
  4. Step 4: Simplify right side
    13,729.44x = 147,065,825.74
  5. Step 5: Solve for x
    x = 147,065,825.74/13,729.44
  6. Step 6: Final answer
    x = 10,711.71

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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.