Home / 20,811.88-28,695.85-16,820.65

Finding the Fourth Proportional to 20,811.88, 28,695.85 and 16,820.65

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Solution

The fourth proportional to 20,811.88, 28,695.85 and 16,820.65 is: 23,192.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.88 : 28,695.85 = 16,820.65 : x
  2. Step 2: Convert to fraction form
    20,811.88/28,695.85 = 16,820.65/x
  3. Step 3: Cross multiply
    20,811.88x = 28,695.85 × 16,820.65
  4. Step 4: Simplify right side
    20,811.88x = 482,682,849.30
  5. Step 5: Solve for x
    x = 482,682,849.30/20,811.88
  6. Step 6: Final answer
    x = 23,192.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.