Home / 21,227.10-29,284.31-13,255.49

Finding the Fourth Proportional to 21,227.10, 29,284.31 and 13,255.49

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Solution

The fourth proportional to 21,227.10, 29,284.31 and 13,255.49 is: 18,286.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,227.10 : 29,284.31 = 13,255.49 : x
  2. Step 2: Convert to fraction form
    21,227.10/29,284.31 = 13,255.49/x
  3. Step 3: Cross multiply
    21,227.10x = 29,284.31 × 13,255.49
  4. Step 4: Simplify right side
    21,227.10x = 388,177,765.08
  5. Step 5: Solve for x
    x = 388,177,765.08/21,227.10
  6. Step 6: Final answer
    x = 18,286.90

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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.