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Finding the Fourth Proportional to 21,375.77, 29,499.05 and 11,944.31

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Solution

The fourth proportional to 21,375.77, 29,499.05 and 11,944.31 is: 16,483.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.77 : 29,499.05 = 11,944.31 : x
  2. Step 2: Convert to fraction form
    21,375.77/29,499.05 = 11,944.31/x
  3. Step 3: Cross multiply
    21,375.77x = 29,499.05 × 11,944.31
  4. Step 4: Simplify right side
    21,375.77x = 352,345,797.91
  5. Step 5: Solve for x
    x = 352,345,797.91/21,375.77
  6. Step 6: Final answer
    x = 16,483.42

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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.