Home / 7,720.20-11,573.37-2,788.68

Finding the Fourth Proportional to 7,720.20, 11,573.37 and 2,788.68

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Solution

The fourth proportional to 7,720.20, 11,573.37 and 2,788.68 is: 4,180.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.20 : 11,573.37 = 2,788.68 : x
  2. Step 2: Convert to fraction form
    7,720.20/11,573.37 = 2,788.68/x
  3. Step 3: Cross multiply
    7,720.20x = 11,573.37 × 2,788.68
  4. Step 4: Simplify right side
    7,720.20x = 32,274,425.45
  5. Step 5: Solve for x
    x = 32,274,425.45/7,720.20
  6. Step 6: Final answer
    x = 4,180.52

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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.