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Finding the Fourth Proportional to 21,081.96, 29,091.24 and 11,649.96

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Solution

The fourth proportional to 21,081.96, 29,091.24 and 11,649.96 is: 16,075.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.96 : 29,091.24 = 11,649.96 : x
  2. Step 2: Convert to fraction form
    21,081.96/29,091.24 = 11,649.96/x
  3. Step 3: Cross multiply
    21,081.96x = 29,091.24 × 11,649.96
  4. Step 4: Simplify right side
    21,081.96x = 338,911,782.35
  5. Step 5: Solve for x
    x = 338,911,782.35/21,081.96
  6. Step 6: Final answer
    x = 16,075.91

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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.