Home / 4,086.80-6,127.20-1,620.40

Finding the Fourth Proportional to 4,086.80, 6,127.20 and 1,620.40

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Solution

The fourth proportional to 4,086.80, 6,127.20 and 1,620.40 is: 2,429.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,086.80 : 6,127.20 = 1,620.40 : x
  2. Step 2: Convert to fraction form
    4,086.80/6,127.20 = 1,620.40/x
  3. Step 3: Cross multiply
    4,086.80x = 6,127.20 × 1,620.40
  4. Step 4: Simplify right side
    4,086.80x = 9,928,514.88
  5. Step 5: Solve for x
    x = 9,928,514.88/4,086.80
  6. Step 6: Final answer
    x = 2,429.41

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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.