Home / 3,899.46-5,381.67-2,220.96

Finding the Fourth Proportional to 3,899.46, 5,381.67 and 2,220.96

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Solution

The fourth proportional to 3,899.46, 5,381.67 and 2,220.96 is: 3,065.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.46 : 5,381.67 = 2,220.96 : x
  2. Step 2: Convert to fraction form
    3,899.46/5,381.67 = 2,220.96/x
  3. Step 3: Cross multiply
    3,899.46x = 5,381.67 × 2,220.96
  4. Step 4: Simplify right side
    3,899.46x = 11,952,473.80
  5. Step 5: Solve for x
    x = 11,952,473.80/3,899.46
  6. Step 6: Final answer
    x = 3,065.16

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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.