Home / 20,757.20-31,133.49-7,429.65

Finding the Fourth Proportional to 20,757.20, 31,133.49 and 7,429.65

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Solution

The fourth proportional to 20,757.20, 31,133.49 and 7,429.65 is: 11,143.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.20 : 31,133.49 = 7,429.65 : x
  2. Step 2: Convert to fraction form
    20,757.20/31,133.49 = 7,429.65/x
  3. Step 3: Cross multiply
    20,757.20x = 31,133.49 × 7,429.65
  4. Step 4: Simplify right side
    20,757.20x = 231,310,933.98
  5. Step 5: Solve for x
    x = 231,310,933.98/20,757.20
  6. Step 6: Final answer
    x = 11,143.65

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1.5x scale

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.