Home / 7,989.69-11,984.58-2,145.81

Finding the Fourth Proportional to 7,989.69, 11,984.58 and 2,145.81

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Solution

The fourth proportional to 7,989.69, 11,984.58 and 2,145.81 is: 3,218.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.69 : 11,984.58 = 2,145.81 : x
  2. Step 2: Convert to fraction form
    7,989.69/11,984.58 = 2,145.81/x
  3. Step 3: Cross multiply
    7,989.69x = 11,984.58 × 2,145.81
  4. Step 4: Simplify right side
    7,989.69x = 25,716,631.61
  5. Step 5: Solve for x
    x = 25,716,631.61/7,989.69
  6. Step 6: Final answer
    x = 3,218.73

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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.