Home / 20,078.11-27,706.26-11,125.42

Finding the Fourth Proportional to 20,078.11, 27,706.26 and 11,125.42

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Solution

The fourth proportional to 20,078.11, 27,706.26 and 11,125.42 is: 15,352.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.11 : 27,706.26 = 11,125.42 : x
  2. Step 2: Convert to fraction form
    20,078.11/27,706.26 = 11,125.42/x
  3. Step 3: Cross multiply
    20,078.11x = 27,706.26 × 11,125.42
  4. Step 4: Simplify right side
    20,078.11x = 308,243,709.86
  5. Step 5: Solve for x
    x = 308,243,709.86/20,078.11
  6. Step 6: Final answer
    x = 15,352.23

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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.