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Finding the Fourth Proportional to 7,882.80, 10,879.56 and 4,740.72

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Solution

The fourth proportional to 7,882.80, 10,879.56 and 4,740.72 is: 6,542.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,882.80 : 10,879.56 = 4,740.72 : x
  2. Step 2: Convert to fraction form
    7,882.80/10,879.56 = 4,740.72/x
  3. Step 3: Cross multiply
    7,882.80x = 10,879.56 × 4,740.72
  4. Step 4: Simplify right side
    7,882.80x = 51,576,947.68
  5. Step 5: Solve for x
    x = 51,576,947.68/7,882.80
  6. Step 6: Final answer
    x = 6,542.97

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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.