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Finding the Fourth Proportional to 28,119.25, 38,806.39 and 15,544

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Solution

The fourth proportional to 28,119.25, 38,806.39 and 15,544 is: 21,451.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.25 : 38,806.39 = 15,544 : x
  2. Step 2: Convert to fraction form
    28,119.25/38,806.39 = 15,544/x
  3. Step 3: Cross multiply
    28,119.25x = 38,806.39 × 15,544
  4. Step 4: Simplify right side
    28,119.25x = 603,206,526.16
  5. Step 5: Solve for x
    x = 603,206,526.16/28,119.25
  6. Step 6: Final answer
    x = 21,451.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.