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Finding the Fourth Proportional to 7,489.80, 11,233.80 and 3,106.80

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Solution

The fourth proportional to 7,489.80, 11,233.80 and 3,106.80 is: 4,659.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.80 : 11,233.80 = 3,106.80 : x
  2. Step 2: Convert to fraction form
    7,489.80/11,233.80 = 3,106.80/x
  3. Step 3: Cross multiply
    7,489.80x = 11,233.80 × 3,106.80
  4. Step 4: Simplify right side
    7,489.80x = 34,901,169.84
  5. Step 5: Solve for x
    x = 34,901,169.84/7,489.80
  6. Step 6: Final answer
    x = 4,659.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.