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Finding the Fourth Proportional to 20,225.88, 27,911.88 and 11,729.76

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Solution

The fourth proportional to 20,225.88, 27,911.88 and 11,729.76 is: 16,187.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,225.88 : 27,911.88 = 11,729.76 : x
  2. Step 2: Convert to fraction form
    20,225.88/27,911.88 = 11,729.76/x
  3. Step 3: Cross multiply
    20,225.88x = 27,911.88 × 11,729.76
  4. Step 4: Simplify right side
    20,225.88x = 327,399,653.55
  5. Step 5: Solve for x
    x = 327,399,653.55/20,225.88
  6. Step 6: Final answer
    x = 16,187.16

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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.