Home / 21,311.33-31,926.10-11,922.91

Finding the Fourth Proportional to 21,311.33, 31,926.10 and 11,922.91

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Solution

The fourth proportional to 21,311.33, 31,926.10 and 11,922.91 is: 17,861.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.33 : 31,926.10 = 11,922.91 : x
  2. Step 2: Convert to fraction form
    21,311.33/31,926.10 = 11,922.91/x
  3. Step 3: Cross multiply
    21,311.33x = 31,926.10 × 11,922.91
  4. Step 4: Simplify right side
    21,311.33x = 380,651,974.58
  5. Step 5: Solve for x
    x = 380,651,974.58/21,311.33
  6. Step 6: Final answer
    x = 17,861.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.