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Finding the Fourth Proportional to 20,111.00, 27,753.08 and 11,159.87

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Solution

The fourth proportional to 20,111.00, 27,753.08 and 11,159.87 is: 15,400.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.00 : 27,753.08 = 11,159.87 : x
  2. Step 2: Convert to fraction form
    20,111.00/27,753.08 = 11,159.87/x
  3. Step 3: Cross multiply
    20,111.00x = 27,753.08 × 11,159.87
  4. Step 4: Simplify right side
    20,111.00x = 309,720,570.33
  5. Step 5: Solve for x
    x = 309,720,570.33/20,111.00
  6. Step 6: Final answer
    x = 15,400.56

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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.