Home / 20,249.53-30,381.13-12,758.72

Finding the Fourth Proportional to 20,249.53, 30,381.13 and 12,758.72

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Solution

The fourth proportional to 20,249.53, 30,381.13 and 12,758.72 is: 19,142.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,249.53 : 30,381.13 = 12,758.72 : x
  2. Step 2: Convert to fraction form
    20,249.53/30,381.13 = 12,758.72/x
  3. Step 3: Cross multiply
    20,249.53x = 30,381.13 × 12,758.72
  4. Step 4: Simplify right side
    20,249.53x = 387,624,203.97
  5. Step 5: Solve for x
    x = 387,624,203.97/20,249.53
  6. Step 6: Final answer
    x = 19,142.38

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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.