Home / 7,143.45-10,716.73-2,145.61

Finding the Fourth Proportional to 7,143.45, 10,716.73 and 2,145.61

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Solution

The fourth proportional to 7,143.45, 10,716.73 and 2,145.61 is: 3,218.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.45 : 10,716.73 = 2,145.61 : x
  2. Step 2: Convert to fraction form
    7,143.45/10,716.73 = 2,145.61/x
  3. Step 3: Cross multiply
    7,143.45x = 10,716.73 × 2,145.61
  4. Step 4: Simplify right side
    7,143.45x = 22,993,931.09
  5. Step 5: Solve for x
    x = 22,993,931.09/7,143.45
  6. Step 6: Final answer
    x = 3,218.88

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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.