Home / 7,988.50-11,982.83-2,145.11

Finding the Fourth Proportional to 7,988.50, 11,982.83 and 2,145.11

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Solution

The fourth proportional to 7,988.50, 11,982.83 and 2,145.11 is: 3,217.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.50 : 11,982.83 = 2,145.11 : x
  2. Step 2: Convert to fraction form
    7,988.50/11,982.83 = 2,145.11/x
  3. Step 3: Cross multiply
    7,988.50x = 11,982.83 × 2,145.11
  4. Step 4: Simplify right side
    7,988.50x = 25,704,491.26
  5. Step 5: Solve for x
    x = 25,704,491.26/7,988.50
  6. Step 6: Final answer
    x = 3,217.69

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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.