Home / 21,221.64-29,286.78-11,790.18

Finding the Fourth Proportional to 21,221.64, 29,286.78 and 11,790.18

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Solution

The fourth proportional to 21,221.64, 29,286.78 and 11,790.18 is: 16,270.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.64 : 29,286.78 = 11,790.18 : x
  2. Step 2: Convert to fraction form
    21,221.64/29,286.78 = 11,790.18/x
  3. Step 3: Cross multiply
    21,221.64x = 29,286.78 × 11,790.18
  4. Step 4: Simplify right side
    21,221.64x = 345,296,407.82
  5. Step 5: Solve for x
    x = 345,296,407.82/21,221.64
  6. Step 6: Final answer
    x = 16,270.96

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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.