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Finding the Fourth Proportional to 7,939.80, 10,954.74 and 4,751.79

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Solution

The fourth proportional to 7,939.80, 10,954.74 and 4,751.79 is: 6,556.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.80 : 10,954.74 = 4,751.79 : x
  2. Step 2: Convert to fraction form
    7,939.80/10,954.74 = 4,751.79/x
  3. Step 3: Cross multiply
    7,939.80x = 10,954.74 × 4,751.79
  4. Step 4: Simplify right side
    7,939.80x = 52,054,623.98
  5. Step 5: Solve for x
    x = 52,054,623.98/7,939.80
  6. Step 6: Final answer
    x = 6,556.16

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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.