Home / 21,231.60-29,299.76-11,671.66

Finding the Fourth Proportional to 21,231.60, 29,299.76 and 11,671.66

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Solution

The fourth proportional to 21,231.60, 29,299.76 and 11,671.66 is: 16,106.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.60 : 29,299.76 = 11,671.66 : x
  2. Step 2: Convert to fraction form
    21,231.60/29,299.76 = 11,671.66/x
  3. Step 3: Cross multiply
    21,231.60x = 29,299.76 × 11,671.66
  4. Step 4: Simplify right side
    21,231.60x = 341,976,836.80
  5. Step 5: Solve for x
    x = 341,976,836.80/21,231.60
  6. Step 6: Final answer
    x = 16,106.97

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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.