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Finding the Fourth Proportional to 18,115.90, 27,170.94 and 4,965.20

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Solution

The fourth proportional to 18,115.90, 27,170.94 and 4,965.20 is: 7,447.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.90 : 27,170.94 = 4,965.20 : x
  2. Step 2: Convert to fraction form
    18,115.90/27,170.94 = 4,965.20/x
  3. Step 3: Cross multiply
    18,115.90x = 27,170.94 × 4,965.20
  4. Step 4: Simplify right side
    18,115.90x = 134,909,151.29
  5. Step 5: Solve for x
    x = 134,909,151.29/18,115.90
  6. Step 6: Final answer
    x = 7,447.00

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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.