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Finding the Fourth Proportional to 18,139.05, 27,219.08 and 7,608.13

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Solution

The fourth proportional to 18,139.05, 27,219.08 and 7,608.13 is: 11,416.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.05 : 27,219.08 = 7,608.13 : x
  2. Step 2: Convert to fraction form
    18,139.05/27,219.08 = 7,608.13/x
  3. Step 3: Cross multiply
    18,139.05x = 27,219.08 × 7,608.13
  4. Step 4: Simplify right side
    18,139.05x = 207,086,309.37
  5. Step 5: Solve for x
    x = 207,086,309.37/18,139.05
  6. Step 6: Final answer
    x = 11,416.60

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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.