Home / 21,211.08-29,272.14-11,781.42

Finding the Fourth Proportional to 21,211.08, 29,272.14 and 11,781.42

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Solution

The fourth proportional to 21,211.08, 29,272.14 and 11,781.42 is: 16,258.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.08 : 29,272.14 = 11,781.42 : x
  2. Step 2: Convert to fraction form
    21,211.08/29,272.14 = 11,781.42/x
  3. Step 3: Cross multiply
    21,211.08x = 29,272.14 × 11,781.42
  4. Step 4: Simplify right side
    21,211.08x = 344,867,375.64
  5. Step 5: Solve for x
    x = 344,867,375.64/21,211.08
  6. Step 6: Final answer
    x = 16,258.83

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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.