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Finding the Fourth Proportional to 13,728.03, 18,944.55 and 7,759.74

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Solution

The fourth proportional to 13,728.03, 18,944.55 and 7,759.74 is: 10,708.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.03 : 18,944.55 = 7,759.74 : x
  2. Step 2: Convert to fraction form
    13,728.03/18,944.55 = 7,759.74/x
  3. Step 3: Cross multiply
    13,728.03x = 18,944.55 × 7,759.74
  4. Step 4: Simplify right side
    13,728.03x = 147,004,782.42
  5. Step 5: Solve for x
    x = 147,004,782.42/13,728.03
  6. Step 6: Final answer
    x = 10,708.37

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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.