Home / 3,899.83-5,381.22-2,220.70

Finding the Fourth Proportional to 3,899.83, 5,381.22 and 2,220.70

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Solution

The fourth proportional to 3,899.83, 5,381.22 and 2,220.70 is: 3,064.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.83 : 5,381.22 = 2,220.70 : x
  2. Step 2: Convert to fraction form
    3,899.83/5,381.22 = 2,220.70/x
  3. Step 3: Cross multiply
    3,899.83x = 5,381.22 × 2,220.70
  4. Step 4: Simplify right side
    3,899.83x = 11,950,075.25
  5. Step 5: Solve for x
    x = 11,950,075.25/3,899.83
  6. Step 6: Final answer
    x = 3,064.26

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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.