Home / 20,049.78-27,667.70-11,436.30

Finding the Fourth Proportional to 20,049.78, 27,667.70 and 11,436.30

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Solution

The fourth proportional to 20,049.78, 27,667.70 and 11,436.30 is: 15,781.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,049.78 : 27,667.70 = 11,436.30 : x
  2. Step 2: Convert to fraction form
    20,049.78/27,667.70 = 11,436.30/x
  3. Step 3: Cross multiply
    20,049.78x = 27,667.70 × 11,436.30
  4. Step 4: Simplify right side
    20,049.78x = 316,416,076.93
  5. Step 5: Solve for x
    x = 316,416,076.93/20,049.78
  6. Step 6: Final answer
    x = 15,781.53

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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.