Home / 13,989.11-20,983.68-13,381.71

Finding the Fourth Proportional to 13,989.11, 20,983.68 and 13,381.71

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Solution

The fourth proportional to 13,989.11, 20,983.68 and 13,381.71 is: 20,072.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.11 : 20,983.68 = 13,381.71 : x
  2. Step 2: Convert to fraction form
    13,989.11/20,983.68 = 13,381.71/x
  3. Step 3: Cross multiply
    13,989.11x = 20,983.68 × 13,381.71
  4. Step 4: Simplify right side
    13,989.11x = 280,797,453.58
  5. Step 5: Solve for x
    x = 280,797,453.58/13,989.11
  6. Step 6: Final answer
    x = 20,072.57

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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.