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Finding the Fourth Proportional to 18,115.09, 27,167.36 and 7,019.30

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Solution

The fourth proportional to 18,115.09, 27,167.36 and 7,019.30 is: 10,526.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.09 : 27,167.36 = 7,019.30 : x
  2. Step 2: Convert to fraction form
    18,115.09/27,167.36 = 7,019.30/x
  3. Step 3: Cross multiply
    18,115.09x = 27,167.36 × 7,019.30
  4. Step 4: Simplify right side
    18,115.09x = 190,695,850.05
  5. Step 5: Solve for x
    x = 190,695,850.05/18,115.09
  6. Step 6: Final answer
    x = 10,526.91

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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.