Home / 20,142.36-27,793.80-11,188.62

Finding the Fourth Proportional to 20,142.36, 27,793.80 and 11,188.62

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Solution

The fourth proportional to 20,142.36, 27,793.80 and 11,188.62 is: 15,438.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.36 : 27,793.80 = 11,188.62 : x
  2. Step 2: Convert to fraction form
    20,142.36/27,793.80 = 11,188.62/x
  3. Step 3: Cross multiply
    20,142.36x = 27,793.80 × 11,188.62
  4. Step 4: Simplify right side
    20,142.36x = 310,974,266.56
  5. Step 5: Solve for x
    x = 310,974,266.56/20,142.36
  6. Step 6: Final answer
    x = 15,438.82

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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.