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Finding the Fourth Proportional to 18,151.20, 27,218.70 and 7,054.20

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Solution

The fourth proportional to 18,151.20, 27,218.70 and 7,054.20 is: 10,578.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,151.20 : 27,218.70 = 7,054.20 : x
  2. Step 2: Convert to fraction form
    18,151.20/27,218.70 = 7,054.20/x
  3. Step 3: Cross multiply
    18,151.20x = 27,218.70 × 7,054.20
  4. Step 4: Simplify right side
    18,151.20x = 192,006,153.54
  5. Step 5: Solve for x
    x = 192,006,153.54/18,151.20
  6. Step 6: Final answer
    x = 10,578.15

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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.