Home / 12,921.23-19,381.38-3,687.23

Finding the Fourth Proportional to 12,921.23, 19,381.38 and 3,687.23

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Solution

The fourth proportional to 12,921.23, 19,381.38 and 3,687.23 is: 5,530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.23 : 19,381.38 = 3,687.23 : x
  2. Step 2: Convert to fraction form
    12,921.23/19,381.38 = 3,687.23/x
  3. Step 3: Cross multiply
    12,921.23x = 19,381.38 × 3,687.23
  4. Step 4: Simplify right side
    12,921.23x = 71,463,508.87
  5. Step 5: Solve for x
    x = 71,463,508.87/12,921.23
  6. Step 6: Final answer
    x = 5,530.71

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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.