Home / 13,686.03-20,450.79-10,286.73

Finding the Fourth Proportional to 13,686.03, 20,450.79 and 10,286.73

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Solution

The fourth proportional to 13,686.03, 20,450.79 and 10,286.73 is: 15,371.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.03 : 20,450.79 = 10,286.73 : x
  2. Step 2: Convert to fraction form
    13,686.03/20,450.79 = 10,286.73/x
  3. Step 3: Cross multiply
    13,686.03x = 20,450.79 × 10,286.73
  4. Step 4: Simplify right side
    13,686.03x = 210,371,755.02
  5. Step 5: Solve for x
    x = 210,371,755.02/13,686.03
  6. Step 6: Final answer
    x = 15,371.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.