Home / 20,142.49-27,795.40-11,189.43

Finding the Fourth Proportional to 20,142.49, 27,795.40 and 11,189.43

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Solution

The fourth proportional to 20,142.49, 27,795.40 and 11,189.43 is: 15,440.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.49 : 27,795.40 = 11,189.43 : x
  2. Step 2: Convert to fraction form
    20,142.49/27,795.40 = 11,189.43/x
  3. Step 3: Cross multiply
    20,142.49x = 27,795.40 × 11,189.43
  4. Step 4: Simplify right side
    20,142.49x = 311,014,682.62
  5. Step 5: Solve for x
    x = 311,014,682.62/20,142.49
  6. Step 6: Final answer
    x = 15,440.73

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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.