Home / 20,922.36-28,880.72-13,858.36

Finding the Fourth Proportional to 20,922.36, 28,880.72 and 13,858.36

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Solution

The fourth proportional to 20,922.36, 28,880.72 and 13,858.36 is: 19,129.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.36 : 28,880.72 = 13,858.36 : x
  2. Step 2: Convert to fraction form
    20,922.36/28,880.72 = 13,858.36/x
  3. Step 3: Cross multiply
    20,922.36x = 28,880.72 × 13,858.36
  4. Step 4: Simplify right side
    20,922.36x = 400,239,414.82
  5. Step 5: Solve for x
    x = 400,239,414.82/20,922.36
  6. Step 6: Final answer
    x = 19,129.75

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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.