Home / 7,720.32-11,579.40-2,789.28

Finding the Fourth Proportional to 7,720.32, 11,579.40 and 2,789.28

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Solution

The fourth proportional to 7,720.32, 11,579.40 and 2,789.28 is: 4,183.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.32 : 11,579.40 = 2,789.28 : x
  2. Step 2: Convert to fraction form
    7,720.32/11,579.40 = 2,789.28/x
  3. Step 3: Cross multiply
    7,720.32x = 11,579.40 × 2,789.28
  4. Step 4: Simplify right side
    7,720.32x = 32,298,188.83
  5. Step 5: Solve for x
    x = 32,298,188.83/7,720.32
  6. Step 6: Final answer
    x = 4,183.53

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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.