Home / 20,078.28-27,707.96-11,125.78

Finding the Fourth Proportional to 20,078.28, 27,707.96 and 11,125.78

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Solution

The fourth proportional to 20,078.28, 27,707.96 and 11,125.78 is: 15,353.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.28 : 27,707.96 = 11,125.78 : x
  2. Step 2: Convert to fraction form
    20,078.28/27,707.96 = 11,125.78/x
  3. Step 3: Cross multiply
    20,078.28x = 27,707.96 × 11,125.78
  4. Step 4: Simplify right side
    20,078.28x = 308,272,625.75
  5. Step 5: Solve for x
    x = 308,272,625.75/20,078.28
  6. Step 6: Final answer
    x = 15,353.54

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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.