Home / 3,899.38-5,381.28-2,221.04

Finding the Fourth Proportional to 3,899.38, 5,381.28 and 2,221.04

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Solution

The fourth proportional to 3,899.38, 5,381.28 and 2,221.04 is: 3,065.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.38 : 5,381.28 = 2,221.04 : x
  2. Step 2: Convert to fraction form
    3,899.38/5,381.28 = 2,221.04/x
  3. Step 3: Cross multiply
    3,899.38x = 5,381.28 × 2,221.04
  4. Step 4: Simplify right side
    3,899.38x = 11,952,038.13
  5. Step 5: Solve for x
    x = 11,952,038.13/3,899.38
  6. Step 6: Final answer
    x = 3,065.11

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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.