Home / 20,553.75-28,364.18-11,122.31

Finding the Fourth Proportional to 20,553.75, 28,364.18 and 11,122.31

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Solution

The fourth proportional to 20,553.75, 28,364.18 and 11,122.31 is: 15,348.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.75 : 28,364.18 = 11,122.31 : x
  2. Step 2: Convert to fraction form
    20,553.75/28,364.18 = 11,122.31/x
  3. Step 3: Cross multiply
    20,553.75x = 28,364.18 × 11,122.31
  4. Step 4: Simplify right side
    20,553.75x = 315,475,218.15
  5. Step 5: Solve for x
    x = 315,475,218.15/20,553.75
  6. Step 6: Final answer
    x = 15,348.79

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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.