Home / 13,491.24-20,142.69-11,640.36

Finding the Fourth Proportional to 13,491.24, 20,142.69 and 11,640.36

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Solution

The fourth proportional to 13,491.24, 20,142.69 and 11,640.36 is: 17,379.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.24 : 20,142.69 = 11,640.36 : x
  2. Step 2: Convert to fraction form
    13,491.24/20,142.69 = 11,640.36/x
  3. Step 3: Cross multiply
    13,491.24x = 20,142.69 × 11,640.36
  4. Step 4: Simplify right side
    13,491.24x = 234,468,162.97
  5. Step 5: Solve for x
    x = 234,468,162.97/13,491.24
  6. Step 6: Final answer
    x = 17,379.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.