Home / 20,909.20-31,330.20-11,035.60

Finding the Fourth Proportional to 20,909.20, 31,330.20 and 11,035.60

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Solution

The fourth proportional to 20,909.20, 31,330.20 and 11,035.60 is: 16,535.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.20 : 31,330.20 = 11,035.60 : x
  2. Step 2: Convert to fraction form
    20,909.20/31,330.20 = 11,035.60/x
  3. Step 3: Cross multiply
    20,909.20x = 31,330.20 × 11,035.60
  4. Step 4: Simplify right side
    20,909.20x = 345,747,555.12
  5. Step 5: Solve for x
    x = 345,747,555.12/20,909.20
  6. Step 6: Final answer
    x = 16,535.67

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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.