Home / 20,790.45-31,189.79-6,747.87

Finding the Fourth Proportional to 20,790.45, 31,189.79 and 6,747.87

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Solution

The fourth proportional to 20,790.45, 31,189.79 and 6,747.87 is: 10,123.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.45 : 31,189.79 = 6,747.87 : x
  2. Step 2: Convert to fraction form
    20,790.45/31,189.79 = 6,747.87/x
  3. Step 3: Cross multiply
    20,790.45x = 31,189.79 × 6,747.87
  4. Step 4: Simplify right side
    20,790.45x = 210,464,614.51
  5. Step 5: Solve for x
    x = 210,464,614.51/20,790.45
  6. Step 6: Final answer
    x = 10,123.14

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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.