Home / 20,191.86-30,277.76-12,790.71

Finding the Fourth Proportional to 20,191.86, 30,277.76 and 12,790.71

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Solution

The fourth proportional to 20,191.86, 30,277.76 and 12,790.71 is: 19,179.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.86 : 30,277.76 = 12,790.71 : x
  2. Step 2: Convert to fraction form
    20,191.86/30,277.76 = 12,790.71/x
  3. Step 3: Cross multiply
    20,191.86x = 30,277.76 × 12,790.71
  4. Step 4: Simplify right side
    20,191.86x = 387,273,983.66
  5. Step 5: Solve for x
    x = 387,273,983.66/20,191.86
  6. Step 6: Final answer
    x = 19,179.71

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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.