Home / 20,554.20-28,364.79-11,122.75

Finding the Fourth Proportional to 20,554.20, 28,364.79 and 11,122.75

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Solution

The fourth proportional to 20,554.20, 28,364.79 and 11,122.75 is: 15,349.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.20 : 28,364.79 = 11,122.75 : x
  2. Step 2: Convert to fraction form
    20,554.20/28,364.79 = 11,122.75/x
  3. Step 3: Cross multiply
    20,554.20x = 28,364.79 × 11,122.75
  4. Step 4: Simplify right side
    20,554.20x = 315,494,467.97
  5. Step 5: Solve for x
    x = 315,494,467.97/20,554.20
  6. Step 6: Final answer
    x = 15,349.39

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1.5x scale

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.