Home / 3,603.80-5,394.90-2,142.20

Finding the Fourth Proportional to 3,603.80, 5,394.90 and 2,142.20

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Solution

The fourth proportional to 3,603.80, 5,394.90 and 2,142.20 is: 3,206.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,603.80 : 5,394.90 = 2,142.20 : x
  2. Step 2: Convert to fraction form
    3,603.80/5,394.90 = 2,142.20/x
  3. Step 3: Cross multiply
    3,603.80x = 5,394.90 × 2,142.20
  4. Step 4: Simplify right side
    3,603.80x = 11,556,954.78
  5. Step 5: Solve for x
    x = 11,556,954.78/3,603.80
  6. Step 6: Final answer
    x = 3,206.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.