Home / 9,121.29-13,678.29-3,858.72

Finding the Fourth Proportional to 9,121.29, 13,678.29 and 3,858.72

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Solution

The fourth proportional to 9,121.29, 13,678.29 and 3,858.72 is: 5,786.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.29 : 13,678.29 = 3,858.72 : x
  2. Step 2: Convert to fraction form
    9,121.29/13,678.29 = 3,858.72/x
  3. Step 3: Cross multiply
    9,121.29x = 13,678.29 × 3,858.72
  4. Step 4: Simplify right side
    9,121.29x = 52,780,691.19
  5. Step 5: Solve for x
    x = 52,780,691.19/9,121.29
  6. Step 6: Final answer
    x = 5,786.54

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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.