Home / 20,205.57-27,885.21-11,709.99

Finding the Fourth Proportional to 20,205.57, 27,885.21 and 11,709.99

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Solution

The fourth proportional to 20,205.57, 27,885.21 and 11,709.99 is: 16,160.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.57 : 27,885.21 = 11,709.99 : x
  2. Step 2: Convert to fraction form
    20,205.57/27,885.21 = 11,709.99/x
  3. Step 3: Cross multiply
    20,205.57x = 27,885.21 × 11,709.99
  4. Step 4: Simplify right side
    20,205.57x = 326,535,530.25
  5. Step 5: Solve for x
    x = 326,535,530.25/20,205.57
  6. Step 6: Final answer
    x = 16,160.67

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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.