Home / 3,613.46-4,986.78-2,121.81

Finding the Fourth Proportional to 3,613.46, 4,986.78 and 2,121.81

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Solution

The fourth proportional to 3,613.46, 4,986.78 and 2,121.81 is: 2,928.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.46 : 4,986.78 = 2,121.81 : x
  2. Step 2: Convert to fraction form
    3,613.46/4,986.78 = 2,121.81/x
  3. Step 3: Cross multiply
    3,613.46x = 4,986.78 × 2,121.81
  4. Step 4: Simplify right side
    3,613.46x = 10,580,999.67
  5. Step 5: Solve for x
    x = 10,580,999.67/3,613.46
  6. Step 6: Final answer
    x = 2,928.22

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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.