Home / 7,720.80-11,581.68-3,824.16

Finding the Fourth Proportional to 7,720.80, 11,581.68 and 3,824.16

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Solution

The fourth proportional to 7,720.80, 11,581.68 and 3,824.16 is: 5,736.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.80 : 11,581.68 = 3,824.16 : x
  2. Step 2: Convert to fraction form
    7,720.80/11,581.68 = 3,824.16/x
  3. Step 3: Cross multiply
    7,720.80x = 11,581.68 × 3,824.16
  4. Step 4: Simplify right side
    7,720.80x = 44,290,197.39
  5. Step 5: Solve for x
    x = 44,290,197.39/7,720.80
  6. Step 6: Final answer
    x = 5,736.48

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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.