Home / 20,078.89-27,709.09-11,126.57

Finding the Fourth Proportional to 20,078.89, 27,709.09 and 11,126.57

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Solution

The fourth proportional to 20,078.89, 27,709.09 and 11,126.57 is: 15,354.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.89 : 27,709.09 = 11,126.57 : x
  2. Step 2: Convert to fraction form
    20,078.89/27,709.09 = 11,126.57/x
  3. Step 3: Cross multiply
    20,078.89x = 27,709.09 × 11,126.57
  4. Step 4: Simplify right side
    20,078.89x = 308,306,963.16
  5. Step 5: Solve for x
    x = 308,306,963.16/20,078.89
  6. Step 6: Final answer
    x = 15,354.78

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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.