Home / 20,814.30-28,733.11-13,270.75

Finding the Fourth Proportional to 20,814.30, 28,733.11 and 13,270.75

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Solution

The fourth proportional to 20,814.30, 28,733.11 and 13,270.75 is: 18,319.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.30 : 28,733.11 = 13,270.75 : x
  2. Step 2: Convert to fraction form
    20,814.30/28,733.11 = 13,270.75/x
  3. Step 3: Cross multiply
    20,814.30x = 28,733.11 × 13,270.75
  4. Step 4: Simplify right side
    20,814.30x = 381,309,919.53
  5. Step 5: Solve for x
    x = 381,309,919.53/20,814.30
  6. Step 6: Final answer
    x = 18,319.61

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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.