Home / 21,103.20-29,120.22-11,671.20

Finding the Fourth Proportional to 21,103.20, 29,120.22 and 11,671.20

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Solution

The fourth proportional to 21,103.20, 29,120.22 and 11,671.20 is: 16,105.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.20 : 29,120.22 = 11,671.20 : x
  2. Step 2: Convert to fraction form
    21,103.20/29,120.22 = 11,671.20/x
  3. Step 3: Cross multiply
    21,103.20x = 29,120.22 × 11,671.20
  4. Step 4: Simplify right side
    21,103.20x = 339,867,911.66
  5. Step 5: Solve for x
    x = 339,867,911.66/21,103.20
  6. Step 6: Final answer
    x = 16,105.04

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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.