Home / 20,993.36-28,964.28-11,917.22

Finding the Fourth Proportional to 20,993.36, 28,964.28 and 11,917.22

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Solution

The fourth proportional to 20,993.36, 28,964.28 and 11,917.22 is: 16,442.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.36 : 28,964.28 = 11,917.22 : x
  2. Step 2: Convert to fraction form
    20,993.36/28,964.28 = 11,917.22/x
  3. Step 3: Cross multiply
    20,993.36x = 28,964.28 × 11,917.22
  4. Step 4: Simplify right side
    20,993.36x = 345,173,696.90
  5. Step 5: Solve for x
    x = 345,173,696.90/20,993.36
  6. Step 6: Final answer
    x = 16,442.04

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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.