Home / 7,988.41-11,982.69-2,145.02

Finding the Fourth Proportional to 7,988.41, 11,982.69 and 2,145.02

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Solution

The fourth proportional to 7,988.41, 11,982.69 and 2,145.02 is: 3,217.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.41 : 11,982.69 = 2,145.02 : x
  2. Step 2: Convert to fraction form
    7,988.41/11,982.69 = 2,145.02/x
  3. Step 3: Cross multiply
    7,988.41x = 11,982.69 × 2,145.02
  4. Step 4: Simplify right side
    7,988.41x = 25,703,074.38
  5. Step 5: Solve for x
    x = 25,703,074.38/7,988.41
  6. Step 6: Final answer
    x = 3,217.55

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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.