Home / 13,720.29-20,578.05-3,857.23

Finding the Fourth Proportional to 13,720.29, 20,578.05 and 3,857.23

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Solution

The fourth proportional to 13,720.29, 20,578.05 and 3,857.23 is: 5,785.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.29 : 20,578.05 = 3,857.23 : x
  2. Step 2: Convert to fraction form
    13,720.29/20,578.05 = 3,857.23/x
  3. Step 3: Cross multiply
    13,720.29x = 20,578.05 × 3,857.23
  4. Step 4: Simplify right side
    13,720.29x = 79,374,220.36
  5. Step 5: Solve for x
    x = 79,374,220.36/13,720.29
  6. Step 6: Final answer
    x = 5,785.17

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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.