Home / 3,639.85-5,021.42-2,312.84

Finding the Fourth Proportional to 3,639.85, 5,021.42 and 2,312.84

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Solution

The fourth proportional to 3,639.85, 5,021.42 and 2,312.84 is: 3,190.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.85 : 5,021.42 = 2,312.84 : x
  2. Step 2: Convert to fraction form
    3,639.85/5,021.42 = 2,312.84/x
  3. Step 3: Cross multiply
    3,639.85x = 5,021.42 × 2,312.84
  4. Step 4: Simplify right side
    3,639.85x = 11,613,751.44
  5. Step 5: Solve for x
    x = 11,613,751.44/3,639.85
  6. Step 6: Final answer
    x = 3,190.72

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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.