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Finding the Fourth Proportional to 20,261.59, 27,961.02 and 11,309.09

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Solution

The fourth proportional to 20,261.59, 27,961.02 and 11,309.09 is: 15,606.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.59 : 27,961.02 = 11,309.09 : x
  2. Step 2: Convert to fraction form
    20,261.59/27,961.02 = 11,309.09/x
  3. Step 3: Cross multiply
    20,261.59x = 27,961.02 × 11,309.09
  4. Step 4: Simplify right side
    20,261.59x = 316,213,662.31
  5. Step 5: Solve for x
    x = 316,213,662.31/20,261.59
  6. Step 6: Final answer
    x = 15,606.56

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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.