Home / 7,146.20-10,721-2,983.90

Finding the Fourth Proportional to 7,146.20, 10,721 and 2,983.90

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Solution

The fourth proportional to 7,146.20, 10,721 and 2,983.90 is: 4,476.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,146.20 : 10,721 = 2,983.90 : x
  2. Step 2: Convert to fraction form
    7,146.20/10,721 = 2,983.90/x
  3. Step 3: Cross multiply
    7,146.20x = 10,721 × 2,983.90
  4. Step 4: Simplify right side
    7,146.20x = 31,990,391.90
  5. Step 5: Solve for x
    x = 31,990,391.90/7,146.20
  6. Step 6: Final answer
    x = 4,476.56

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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.