Home / 20,503.10-30,729.73-11,120.87

Finding the Fourth Proportional to 20,503.10, 30,729.73 and 11,120.87

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Solution

The fourth proportional to 20,503.10, 30,729.73 and 11,120.87 is: 16,667.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.10 : 30,729.73 = 11,120.87 : x
  2. Step 2: Convert to fraction form
    20,503.10/30,729.73 = 11,120.87/x
  3. Step 3: Cross multiply
    20,503.10x = 30,729.73 × 11,120.87
  4. Step 4: Simplify right side
    20,503.10x = 341,741,332.47
  5. Step 5: Solve for x
    x = 341,741,332.47/20,503.10
  6. Step 6: Final answer
    x = 16,667.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.