Home / 4,261.20-6,391.80-3,109.20

Finding the Fourth Proportional to 4,261.20, 6,391.80 and 3,109.20

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Solution

The fourth proportional to 4,261.20, 6,391.80 and 3,109.20 is: 4,663.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,261.20 : 6,391.80 = 3,109.20 : x
  2. Step 2: Convert to fraction form
    4,261.20/6,391.80 = 3,109.20/x
  3. Step 3: Cross multiply
    4,261.20x = 6,391.80 × 3,109.20
  4. Step 4: Simplify right side
    4,261.20x = 19,873,384.56
  5. Step 5: Solve for x
    x = 19,873,384.56/4,261.20
  6. Step 6: Final answer
    x = 4,663.80

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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.