Home / 13,375.68-18,416.21-11,781.33

Finding the Fourth Proportional to 13,375.68, 18,416.21 and 11,781.33

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Solution

The fourth proportional to 13,375.68, 18,416.21 and 11,781.33 is: 16,221.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.68 : 18,416.21 = 11,781.33 : x
  2. Step 2: Convert to fraction form
    13,375.68/18,416.21 = 11,781.33/x
  3. Step 3: Cross multiply
    13,375.68x = 18,416.21 × 11,781.33
  4. Step 4: Simplify right side
    13,375.68x = 216,967,388.45
  5. Step 5: Solve for x
    x = 216,967,388.45/13,375.68
  6. Step 6: Final answer
    x = 16,221.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.