Home / 21,211.29-29,286.23-13,257.09

Finding the Fourth Proportional to 21,211.29, 29,286.23 and 13,257.09

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Solution

The fourth proportional to 21,211.29, 29,286.23 and 13,257.09 is: 18,303.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.29 : 29,286.23 = 13,257.09 : x
  2. Step 2: Convert to fraction form
    21,211.29/29,286.23 = 13,257.09/x
  3. Step 3: Cross multiply
    21,211.29x = 29,286.23 × 13,257.09
  4. Step 4: Simplify right side
    21,211.29x = 388,250,186.87
  5. Step 5: Solve for x
    x = 388,250,186.87/21,211.29
  6. Step 6: Final answer
    x = 18,303.94

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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.