Home / 20,221.11-27,905.40-11,723.70

Finding the Fourth Proportional to 20,221.11, 27,905.40 and 11,723.70

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Solution

The fourth proportional to 20,221.11, 27,905.40 and 11,723.70 is: 16,178.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.11 : 27,905.40 = 11,723.70 : x
  2. Step 2: Convert to fraction form
    20,221.11/27,905.40 = 11,723.70/x
  3. Step 3: Cross multiply
    20,221.11x = 27,905.40 × 11,723.70
  4. Step 4: Simplify right side
    20,221.11x = 327,154,537.98
  5. Step 5: Solve for x
    x = 327,154,537.98/20,221.11
  6. Step 6: Final answer
    x = 16,178.86

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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.