Home / 20,370.66-28,105.20-11,416.92

Finding the Fourth Proportional to 20,370.66, 28,105.20 and 11,416.92

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Solution

The fourth proportional to 20,370.66, 28,105.20 and 11,416.92 is: 15,751.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.66 : 28,105.20 = 11,416.92 : x
  2. Step 2: Convert to fraction form
    20,370.66/28,105.20 = 11,416.92/x
  3. Step 3: Cross multiply
    20,370.66x = 28,105.20 × 11,416.92
  4. Step 4: Simplify right side
    20,370.66x = 320,874,819.98
  5. Step 5: Solve for x
    x = 320,874,819.98/20,370.66
  6. Step 6: Final answer
    x = 15,751.81

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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.