Home / 20,423.50-28,183.89-11,471.98

Finding the Fourth Proportional to 20,423.50, 28,183.89 and 11,471.98

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Solution

The fourth proportional to 20,423.50, 28,183.89 and 11,471.98 is: 15,831.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.50 : 28,183.89 = 11,471.98 : x
  2. Step 2: Convert to fraction form
    20,423.50/28,183.89 = 11,471.98/x
  3. Step 3: Cross multiply
    20,423.50x = 28,183.89 × 11,471.98
  4. Step 4: Simplify right side
    20,423.50x = 323,325,022.40
  5. Step 5: Solve for x
    x = 323,325,022.40/20,423.50
  6. Step 6: Final answer
    x = 15,831.03

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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.