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Finding the Fourth Proportional to 9,956.20, 13,739.79 and 5,480.20

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Solution

The fourth proportional to 9,956.20, 13,739.79 and 5,480.20 is: 7,562.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,956.20 : 13,739.79 = 5,480.20 : x
  2. Step 2: Convert to fraction form
    9,956.20/13,739.79 = 5,480.20/x
  3. Step 3: Cross multiply
    9,956.20x = 13,739.79 × 5,480.20
  4. Step 4: Simplify right side
    9,956.20x = 75,296,797.16
  5. Step 5: Solve for x
    x = 75,296,797.16/9,956.20
  6. Step 6: Final answer
    x = 7,562.80

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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.