Home / 3,145.69-4,339.78-2,804.86

Finding the Fourth Proportional to 3,145.69, 4,339.78 and 2,804.86

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Solution

The fourth proportional to 3,145.69, 4,339.78 and 2,804.86 is: 3,869.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.69 : 4,339.78 = 2,804.86 : x
  2. Step 2: Convert to fraction form
    3,145.69/4,339.78 = 2,804.86/x
  3. Step 3: Cross multiply
    3,145.69x = 4,339.78 × 2,804.86
  4. Step 4: Simplify right side
    3,145.69x = 12,172,475.33
  5. Step 5: Solve for x
    x = 12,172,475.33/3,145.69
  6. Step 6: Final answer
    x = 3,869.57

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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.