Home / 20,553.42-28,363.73-11,121.96

Finding the Fourth Proportional to 20,553.42, 28,363.73 and 11,121.96

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Solution

The fourth proportional to 20,553.42, 28,363.73 and 11,121.96 is: 15,348.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.42 : 28,363.73 = 11,121.96 : x
  2. Step 2: Convert to fraction form
    20,553.42/28,363.73 = 11,121.96/x
  3. Step 3: Cross multiply
    20,553.42x = 28,363.73 × 11,121.96
  4. Step 4: Simplify right side
    20,553.42x = 315,460,214.90
  5. Step 5: Solve for x
    x = 315,460,214.90/20,553.42
  6. Step 6: Final answer
    x = 15,348.31

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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.