Home / 21,855.36-30,160.44-11,919.36

Finding the Fourth Proportional to 21,855.36, 30,160.44 and 11,919.36

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Solution

The fourth proportional to 21,855.36, 30,160.44 and 11,919.36 is: 16,448.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.36 : 30,160.44 = 11,919.36 : x
  2. Step 2: Convert to fraction form
    21,855.36/30,160.44 = 11,919.36/x
  3. Step 3: Cross multiply
    21,855.36x = 30,160.44 × 11,919.36
  4. Step 4: Simplify right side
    21,855.36x = 359,493,142.12
  5. Step 5: Solve for x
    x = 359,493,142.12/21,855.36
  6. Step 6: Final answer
    x = 16,448.74

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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.