Home / 20,793.35-31,209.60-10,939.70

Finding the Fourth Proportional to 20,793.35, 31,209.60 and 10,939.70

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Solution

The fourth proportional to 20,793.35, 31,209.60 and 10,939.70 is: 16,419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.35 : 31,209.60 = 10,939.70 : x
  2. Step 2: Convert to fraction form
    20,793.35/31,209.60 = 10,939.70/x
  3. Step 3: Cross multiply
    20,793.35x = 31,209.60 × 10,939.70
  4. Step 4: Simplify right side
    20,793.35x = 341,423,661.12
  5. Step 5: Solve for x
    x = 341,423,661.12/20,793.35
  6. Step 6: Final answer
    x = 16,419.85

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1.5x scale

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.