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Finding the Fourth Proportional to 20,110.40, 27,758.72 and 11,728.48

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Solution

The fourth proportional to 20,110.40, 27,758.72 and 11,728.48 is: 16,189.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,110.40 : 27,758.72 = 11,728.48 : x
  2. Step 2: Convert to fraction form
    20,110.40/27,758.72 = 11,728.48/x
  3. Step 3: Cross multiply
    20,110.40x = 27,758.72 × 11,728.48
  4. Step 4: Simplify right side
    20,110.40x = 325,567,592.35
  5. Step 5: Solve for x
    x = 325,567,592.35/20,110.40
  6. Step 6: Final answer
    x = 16,189.02

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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.