Home / 5,115.10-7,659.69-2,803.90

Finding the Fourth Proportional to 5,115.10, 7,659.69 and 2,803.90

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Solution

The fourth proportional to 5,115.10, 7,659.69 and 2,803.90 is: 4,198.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.10 : 7,659.69 = 2,803.90 : x
  2. Step 2: Convert to fraction form
    5,115.10/7,659.69 = 2,803.90/x
  3. Step 3: Cross multiply
    5,115.10x = 7,659.69 × 2,803.90
  4. Step 4: Simplify right side
    5,115.10x = 21,477,004.79
  5. Step 5: Solve for x
    x = 21,477,004.79/5,115.10
  6. Step 6: Final answer
    x = 4,198.75

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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.