Home / 3,900.69-5,375.16-2,779.65

Finding the Fourth Proportional to 3,900.69, 5,375.16 and 2,779.65

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Solution

The fourth proportional to 3,900.69, 5,375.16 and 2,779.65 is: 3,830.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.69 : 5,375.16 = 2,779.65 : x
  2. Step 2: Convert to fraction form
    3,900.69/5,375.16 = 2,779.65/x
  3. Step 3: Cross multiply
    3,900.69x = 5,375.16 × 2,779.65
  4. Step 4: Simplify right side
    3,900.69x = 14,941,063.49
  5. Step 5: Solve for x
    x = 14,941,063.49/3,900.69
  6. Step 6: Final answer
    x = 3,830.36

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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.