Home / 3,867.80-5,337.82-2,189.20

Finding the Fourth Proportional to 3,867.80, 5,337.82 and 2,189.20

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Solution

The fourth proportional to 3,867.80, 5,337.82 and 2,189.20 is: 3,021.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,867.80 : 5,337.82 = 2,189.20 : x
  2. Step 2: Convert to fraction form
    3,867.80/5,337.82 = 2,189.20/x
  3. Step 3: Cross multiply
    3,867.80x = 5,337.82 × 2,189.20
  4. Step 4: Simplify right side
    3,867.80x = 11,685,549.04
  5. Step 5: Solve for x
    x = 11,685,549.04/3,867.80
  6. Step 6: Final answer
    x = 3,021.24

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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.