Home / 3,988-5,984.60-2,115.64

Finding the Fourth Proportional to 3,988, 5,984.60 and 2,115.64

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Solution

The fourth proportional to 3,988, 5,984.60 and 2,115.64 is: 3,174.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988 : 5,984.60 = 2,115.64 : x
  2. Step 2: Convert to fraction form
    3,988/5,984.60 = 2,115.64/x
  3. Step 3: Cross multiply
    3,988x = 5,984.60 × 2,115.64
  4. Step 4: Simplify right side
    3,988x = 12,661,259.14
  5. Step 5: Solve for x
    x = 12,661,259.14/3,988
  6. Step 6: Final answer
    x = 3,174.84

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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.