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Finding the Fourth Proportional to 5,379.76, 7,425.56 and 3,786.76

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Solution

The fourth proportional to 5,379.76, 7,425.56 and 3,786.76 is: 5,226.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379.76 : 7,425.56 = 3,786.76 : x
  2. Step 2: Convert to fraction form
    5,379.76/7,425.56 = 3,786.76/x
  3. Step 3: Cross multiply
    5,379.76x = 7,425.56 × 3,786.76
  4. Step 4: Simplify right side
    5,379.76x = 28,118,813.59
  5. Step 5: Solve for x
    x = 28,118,813.59/5,379.76
  6. Step 6: Final answer
    x = 5,226.78

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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.