Home / 18,148.86-27,218.12-7,621.25

Finding the Fourth Proportional to 18,148.86, 27,218.12 and 7,621.25

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Solution

The fourth proportional to 18,148.86, 27,218.12 and 7,621.25 is: 11,429.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,148.86 : 27,218.12 = 7,621.25 : x
  2. Step 2: Convert to fraction form
    18,148.86/27,218.12 = 7,621.25/x
  3. Step 3: Cross multiply
    18,148.86x = 27,218.12 × 7,621.25
  4. Step 4: Simplify right side
    18,148.86x = 207,436,126.99
  5. Step 5: Solve for x
    x = 207,436,126.99/18,148.86
  6. Step 6: Final answer
    x = 11,429.71

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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.