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Finding the Fourth Proportional to 20,356.91, 28,092.36 and 11,404.49

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Solution

The fourth proportional to 20,356.91, 28,092.36 and 11,404.49 is: 15,738.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.91 : 28,092.36 = 11,404.49 : x
  2. Step 2: Convert to fraction form
    20,356.91/28,092.36 = 11,404.49/x
  3. Step 3: Cross multiply
    20,356.91x = 28,092.36 × 11,404.49
  4. Step 4: Simplify right side
    20,356.91x = 320,379,108.93
  5. Step 5: Solve for x
    x = 320,379,108.93/20,356.91
  6. Step 6: Final answer
    x = 15,738.11

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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.