Home / 7,429.10-11,121.78-5,489.96

Finding the Fourth Proportional to 7,429.10, 11,121.78 and 5,489.96

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Solution

The fourth proportional to 7,429.10, 11,121.78 and 5,489.96 is: 8,218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,429.10 : 11,121.78 = 5,489.96 : x
  2. Step 2: Convert to fraction form
    7,429.10/11,121.78 = 5,489.96/x
  3. Step 3: Cross multiply
    7,429.10x = 11,121.78 × 5,489.96
  4. Step 4: Simplify right side
    7,429.10x = 61,058,127.33
  5. Step 5: Solve for x
    x = 61,058,127.33/7,429.10
  6. Step 6: Final answer
    x = 8,218.78

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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.