Home / 20,404.45-28,164.27-11,908.90

Finding the Fourth Proportional to 20,404.45, 28,164.27 and 11,908.90

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Solution

The fourth proportional to 20,404.45, 28,164.27 and 11,908.90 is: 16,437.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.45 : 28,164.27 = 11,908.90 : x
  2. Step 2: Convert to fraction form
    20,404.45/28,164.27 = 11,908.90/x
  3. Step 3: Cross multiply
    20,404.45x = 28,164.27 × 11,908.90
  4. Step 4: Simplify right side
    20,404.45x = 335,405,475.00
  5. Step 5: Solve for x
    x = 335,405,475.00/20,404.45
  6. Step 6: Final answer
    x = 16,437.86

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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.