Home / 3,899.67-5,381.52-2,220.99

Finding the Fourth Proportional to 3,899.67, 5,381.52 and 2,220.99

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Solution

The fourth proportional to 3,899.67, 5,381.52 and 2,220.99 is: 3,064.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.67 : 5,381.52 = 2,220.99 : x
  2. Step 2: Convert to fraction form
    3,899.67/5,381.52 = 2,220.99/x
  3. Step 3: Cross multiply
    3,899.67x = 5,381.52 × 2,220.99
  4. Step 4: Simplify right side
    3,899.67x = 11,952,302.10
  5. Step 5: Solve for x
    x = 11,952,302.10/3,899.67
  6. Step 6: Final answer
    x = 3,064.95

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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.