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Finding the Fourth Proportional to 7,978,368.39, 11,967,552.84 and 1,994,736.39

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Solution

The fourth proportional to 7,978,368.39, 11,967,552.84 and 1,994,736.39 is: 2,992,104.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978,368.39 : 11,967,552.84 = 1,994,736.39 : x
  2. Step 2: Convert to fraction form
    7,978,368.39/11,967,552.84 = 1,994,736.39/x
  3. Step 3: Cross multiply
    7,978,368.39x = 11,967,552.84 × 1,994,736.39
  4. Step 4: Simplify right side
    7,978,368.39x = 23,872,113,149,195.85
  5. Step 5: Solve for x
    x = 23,872,113,149,195.85/7,978,368.39
  6. Step 6: Final answer
    x = 2,992,104.65

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Similar ratio
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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.