Home / 21,211.54-29,286.57-13,257.34

Finding the Fourth Proportional to 21,211.54, 29,286.57 and 13,257.34

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Solution

The fourth proportional to 21,211.54, 29,286.57 and 13,257.34 is: 18,304.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.54 : 29,286.57 = 13,257.34 : x
  2. Step 2: Convert to fraction form
    21,211.54/29,286.57 = 13,257.34/x
  3. Step 3: Cross multiply
    21,211.54x = 29,286.57 × 13,257.34
  4. Step 4: Simplify right side
    21,211.54x = 388,262,015.92
  5. Step 5: Solve for x
    x = 388,262,015.92/21,211.54
  6. Step 6: Final answer
    x = 18,304.28

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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.