Home / 4,120.85-5,689.37-2,861.51

Finding the Fourth Proportional to 4,120.85, 5,689.37 and 2,861.51

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Solution

The fourth proportional to 4,120.85, 5,689.37 and 2,861.51 is: 3,950.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,120.85 : 5,689.37 = 2,861.51 : x
  2. Step 2: Convert to fraction form
    4,120.85/5,689.37 = 2,861.51/x
  3. Step 3: Cross multiply
    4,120.85x = 5,689.37 × 2,861.51
  4. Step 4: Simplify right side
    4,120.85x = 16,280,167.86
  5. Step 5: Solve for x
    x = 16,280,167.86/4,120.85
  6. Step 6: Final answer
    x = 3,950.68

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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.