Home / 20,106.78-30,162.72-7,631.16

Finding the Fourth Proportional to 20,106.78, 30,162.72 and 7,631.16

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Solution

The fourth proportional to 20,106.78, 30,162.72 and 7,631.16 is: 11,447.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.78 : 30,162.72 = 7,631.16 : x
  2. Step 2: Convert to fraction form
    20,106.78/30,162.72 = 7,631.16/x
  3. Step 3: Cross multiply
    20,106.78x = 30,162.72 × 7,631.16
  4. Step 4: Simplify right side
    20,106.78x = 230,176,542.36
  5. Step 5: Solve for x
    x = 230,176,542.36/20,106.78
  6. Step 6: Final answer
    x = 11,447.71

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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.