Home / 21,286.57-31,871.42-17,328.56

Finding the Fourth Proportional to 21,286.57, 31,871.42 and 17,328.56

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Solution

The fourth proportional to 21,286.57, 31,871.42 and 17,328.56 is: 25,945.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.57 : 31,871.42 = 17,328.56 : x
  2. Step 2: Convert to fraction form
    21,286.57/31,871.42 = 17,328.56/x
  3. Step 3: Cross multiply
    21,286.57x = 31,871.42 × 17,328.56
  4. Step 4: Simplify right side
    21,286.57x = 552,285,819.85
  5. Step 5: Solve for x
    x = 552,285,819.85/21,286.57
  6. Step 6: Final answer
    x = 25,945.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.