Home / 21,811.73-30,118.90-21,106.42

Finding the Fourth Proportional to 21,811.73, 30,118.90 and 21,106.42

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Solution

The fourth proportional to 21,811.73, 30,118.90 and 21,106.42 is: 29,144.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,811.73 : 30,118.90 = 21,106.42 : x
  2. Step 2: Convert to fraction form
    21,811.73/30,118.90 = 21,106.42/x
  3. Step 3: Cross multiply
    21,811.73x = 30,118.90 × 21,106.42
  4. Step 4: Simplify right side
    21,811.73x = 635,702,234.27
  5. Step 5: Solve for x
    x = 635,702,234.27/21,811.73
  6. Step 6: Final answer
    x = 29,144.97

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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.