Home / 7,721.04-11,581.20-3,100.80

Finding the Fourth Proportional to 7,721.04, 11,581.20 and 3,100.80

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Solution

The fourth proportional to 7,721.04, 11,581.20 and 3,100.80 is: 4,651.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.04 : 11,581.20 = 3,100.80 : x
  2. Step 2: Convert to fraction form
    7,721.04/11,581.20 = 3,100.80/x
  3. Step 3: Cross multiply
    7,721.04x = 11,581.20 × 3,100.80
  4. Step 4: Simplify right side
    7,721.04x = 35,910,984.96
  5. Step 5: Solve for x
    x = 35,910,984.96/7,721.04
  6. Step 6: Final answer
    x = 4,651.06

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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.