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Finding the Fourth Proportional to 18,120.98, 27,141.30 and 13,930.16

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Solution

The fourth proportional to 18,120.98, 27,141.30 and 13,930.16 is: 20,864.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.98 : 27,141.30 = 13,930.16 : x
  2. Step 2: Convert to fraction form
    18,120.98/27,141.30 = 13,930.16/x
  3. Step 3: Cross multiply
    18,120.98x = 27,141.30 × 13,930.16
  4. Step 4: Simplify right side
    18,120.98x = 378,082,651.61
  5. Step 5: Solve for x
    x = 378,082,651.61/18,120.98
  6. Step 6: Final answer
    x = 20,864.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.