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Finding the Fourth Proportional to 7,797.78, 11,703.29 and 3,121.07

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Solution

The fourth proportional to 7,797.78, 11,703.29 and 3,121.07 is: 4,684.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,797.78 : 11,703.29 = 3,121.07 : x
  2. Step 2: Convert to fraction form
    7,797.78/11,703.29 = 3,121.07/x
  3. Step 3: Cross multiply
    7,797.78x = 11,703.29 × 3,121.07
  4. Step 4: Simplify right side
    7,797.78x = 36,526,713.20
  5. Step 5: Solve for x
    x = 36,526,713.20/7,797.78
  6. Step 6: Final answer
    x = 4,684.25

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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.