Home / 3,681.12-5,080.36-2,189.40

Finding the Fourth Proportional to 3,681.12, 5,080.36 and 2,189.40

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Solution

The fourth proportional to 3,681.12, 5,080.36 and 2,189.40 is: 3,021.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681.12 : 5,080.36 = 2,189.40 : x
  2. Step 2: Convert to fraction form
    3,681.12/5,080.36 = 2,189.40/x
  3. Step 3: Cross multiply
    3,681.12x = 5,080.36 × 2,189.40
  4. Step 4: Simplify right side
    3,681.12x = 11,122,940.18
  5. Step 5: Solve for x
    x = 11,122,940.18/3,681.12
  6. Step 6: Final answer
    x = 3,021.62

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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.