Home / 20,270.40-27,961.92-11,885.28

Finding the Fourth Proportional to 20,270.40, 27,961.92 and 11,885.28

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Solution

The fourth proportional to 20,270.40, 27,961.92 and 11,885.28 is: 16,395.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.40 : 27,961.92 = 11,885.28 : x
  2. Step 2: Convert to fraction form
    20,270.40/27,961.92 = 11,885.28/x
  3. Step 3: Cross multiply
    20,270.40x = 27,961.92 × 11,885.28
  4. Step 4: Simplify right side
    20,270.40x = 332,335,248.54
  5. Step 5: Solve for x
    x = 332,335,248.54/20,270.40
  6. Step 6: Final answer
    x = 16,395.10

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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.