Home / 13,329.66-19,980.57-5,428.77

Finding the Fourth Proportional to 13,329.66, 19,980.57 and 5,428.77

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Solution

The fourth proportional to 13,329.66, 19,980.57 and 5,428.77 is: 8,137.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,329.66 : 19,980.57 = 5,428.77 : x
  2. Step 2: Convert to fraction form
    13,329.66/19,980.57 = 5,428.77/x
  3. Step 3: Cross multiply
    13,329.66x = 19,980.57 × 5,428.77
  4. Step 4: Simplify right side
    13,329.66x = 108,469,919.00
  5. Step 5: Solve for x
    x = 108,469,919.00/13,329.66
  6. Step 6: Final answer
    x = 8,137.49

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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.