Home / 20,123.42-27,768.78-11,170.10

Finding the Fourth Proportional to 20,123.42, 27,768.78 and 11,170.10

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Solution

The fourth proportional to 20,123.42, 27,768.78 and 11,170.10 is: 15,413.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.42 : 27,768.78 = 11,170.10 : x
  2. Step 2: Convert to fraction form
    20,123.42/27,768.78 = 11,170.10/x
  3. Step 3: Cross multiply
    20,123.42x = 27,768.78 × 11,170.10
  4. Step 4: Simplify right side
    20,123.42x = 310,180,049.48
  5. Step 5: Solve for x
    x = 310,180,049.48/20,123.42
  6. Step 6: Final answer
    x = 15,413.88

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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.