Home / 20,757.72-31,124.61-14,191.86

Finding the Fourth Proportional to 20,757.72, 31,124.61 and 14,191.86

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Solution

The fourth proportional to 20,757.72, 31,124.61 and 14,191.86 is: 21,279.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.72 : 31,124.61 = 14,191.86 : x
  2. Step 2: Convert to fraction form
    20,757.72/31,124.61 = 14,191.86/x
  3. Step 3: Cross multiply
    20,757.72x = 31,124.61 × 14,191.86
  4. Step 4: Simplify right side
    20,757.72x = 441,716,107.67
  5. Step 5: Solve for x
    x = 441,716,107.67/20,757.72
  6. Step 6: Final answer
    x = 21,279.61

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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.