Home / 20,612.85-28,447.11-11,660.73

Finding the Fourth Proportional to 20,612.85, 28,447.11 and 11,660.73

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Solution

The fourth proportional to 20,612.85, 28,447.11 and 11,660.73 is: 16,092.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.85 : 28,447.11 = 11,660.73 : x
  2. Step 2: Convert to fraction form
    20,612.85/28,447.11 = 11,660.73/x
  3. Step 3: Cross multiply
    20,612.85x = 28,447.11 × 11,660.73
  4. Step 4: Simplify right side
    20,612.85x = 331,714,068.99
  5. Step 5: Solve for x
    x = 331,714,068.99/20,612.85
  6. Step 6: Final answer
    x = 16,092.59

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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.