Home / 7,678.36-11,517.48-2,131.78

Finding the Fourth Proportional to 7,678.36, 11,517.48 and 2,131.78

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Solution

The fourth proportional to 7,678.36, 11,517.48 and 2,131.78 is: 3,197.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.36 : 11,517.48 = 2,131.78 : x
  2. Step 2: Convert to fraction form
    7,678.36/11,517.48 = 2,131.78/x
  3. Step 3: Cross multiply
    7,678.36x = 11,517.48 × 2,131.78
  4. Step 4: Simplify right side
    7,678.36x = 24,552,733.51
  5. Step 5: Solve for x
    x = 24,552,733.51/7,678.36
  6. Step 6: Final answer
    x = 3,197.65

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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.