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Finding the Fourth Proportional to 7,091.78, 9,786.49 and 4,440.65

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Solution

The fourth proportional to 7,091.78, 9,786.49 and 4,440.65 is: 6,127.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,091.78 : 9,786.49 = 4,440.65 : x
  2. Step 2: Convert to fraction form
    7,091.78/9,786.49 = 4,440.65/x
  3. Step 3: Cross multiply
    7,091.78x = 9,786.49 × 4,440.65
  4. Step 4: Simplify right side
    7,091.78x = 43,458,376.82
  5. Step 5: Solve for x
    x = 43,458,376.82/7,091.78
  6. Step 6: Final answer
    x = 6,127.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.