Home / 3,988.40-5,979.90-2,114.60

Finding the Fourth Proportional to 3,988.40, 5,979.90 and 2,114.60

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Solution

The fourth proportional to 3,988.40, 5,979.90 and 2,114.60 is: 3,170.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.40 : 5,979.90 = 2,114.60 : x
  2. Step 2: Convert to fraction form
    3,988.40/5,979.90 = 2,114.60/x
  3. Step 3: Cross multiply
    3,988.40x = 5,979.90 × 2,114.60
  4. Step 4: Simplify right side
    3,988.40x = 12,645,096.54
  5. Step 5: Solve for x
    x = 12,645,096.54/3,988.40
  6. Step 6: Final answer
    x = 3,170.47

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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.