Home / 13,728.35-18,944.92-7,759.81

Finding the Fourth Proportional to 13,728.35, 18,944.92 and 7,759.81

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Solution

The fourth proportional to 13,728.35, 18,944.92 and 7,759.81 is: 10,708.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.35 : 18,944.92 = 7,759.81 : x
  2. Step 2: Convert to fraction form
    13,728.35/18,944.92 = 7,759.81/x
  3. Step 3: Cross multiply
    13,728.35x = 18,944.92 × 7,759.81
  4. Step 4: Simplify right side
    13,728.35x = 147,009,013.05
  5. Step 5: Solve for x
    x = 147,009,013.05/13,728.35
  6. Step 6: Final answer
    x = 10,708.42

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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.