Home / 13,720.42-20,578.23-3,857.36

Finding the Fourth Proportional to 13,720.42, 20,578.23 and 3,857.36

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Solution

The fourth proportional to 13,720.42, 20,578.23 and 3,857.36 is: 5,785.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.42 : 20,578.23 = 3,857.36 : x
  2. Step 2: Convert to fraction form
    13,720.42/20,578.23 = 3,857.36/x
  3. Step 3: Cross multiply
    13,720.42x = 20,578.23 × 3,857.36
  4. Step 4: Simplify right side
    13,720.42x = 79,377,538.38
  5. Step 5: Solve for x
    x = 79,377,538.38/13,720.42
  6. Step 6: Final answer
    x = 5,785.36

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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.