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Finding the Fourth Proportional to 7,698.12, 11,551.50 and 3,081.48

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Solution

The fourth proportional to 7,698.12, 11,551.50 and 3,081.48 is: 4,623.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,698.12 : 11,551.50 = 3,081.48 : x
  2. Step 2: Convert to fraction form
    7,698.12/11,551.50 = 3,081.48/x
  3. Step 3: Cross multiply
    7,698.12x = 11,551.50 × 3,081.48
  4. Step 4: Simplify right side
    7,698.12x = 35,595,716.22
  5. Step 5: Solve for x
    x = 35,595,716.22/7,698.12
  6. Step 6: Final answer
    x = 4,623.95

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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.