Home / 20,859.24-28,781.43-11,909.65

Finding the Fourth Proportional to 20,859.24, 28,781.43 and 11,909.65

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Solution

The fourth proportional to 20,859.24, 28,781.43 and 11,909.65 is: 16,432.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.24 : 28,781.43 = 11,909.65 : x
  2. Step 2: Convert to fraction form
    20,859.24/28,781.43 = 11,909.65/x
  3. Step 3: Cross multiply
    20,859.24x = 28,781.43 × 11,909.65
  4. Step 4: Simplify right side
    20,859.24x = 342,776,757.80
  5. Step 5: Solve for x
    x = 342,776,757.80/20,859.24
  6. Step 6: Final answer
    x = 16,432.85

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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.