Home / 4,089.89-6,120.20-3,215.09

Finding the Fourth Proportional to 4,089.89, 6,120.20 and 3,215.09

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Solution

The fourth proportional to 4,089.89, 6,120.20 and 3,215.09 is: 4,811.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,089.89 : 6,120.20 = 3,215.09 : x
  2. Step 2: Convert to fraction form
    4,089.89/6,120.20 = 3,215.09/x
  3. Step 3: Cross multiply
    4,089.89x = 6,120.20 × 3,215.09
  4. Step 4: Simplify right side
    4,089.89x = 19,676,977.74
  5. Step 5: Solve for x
    x = 19,676,977.74/4,089.89
  6. Step 6: Final answer
    x = 4,811.13

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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.