Home / 5,121.54-7,684.72-2,655.02

Finding the Fourth Proportional to 5,121.54, 7,684.72 and 2,655.02

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Solution

The fourth proportional to 5,121.54, 7,684.72 and 2,655.02 is: 3,983.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.54 : 7,684.72 = 2,655.02 : x
  2. Step 2: Convert to fraction form
    5,121.54/7,684.72 = 2,655.02/x
  3. Step 3: Cross multiply
    5,121.54x = 7,684.72 × 2,655.02
  4. Step 4: Simplify right side
    5,121.54x = 20,403,097.87
  5. Step 5: Solve for x
    x = 20,403,097.87/5,121.54
  6. Step 6: Final answer
    x = 3,983.78

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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.