Home / 20,427.88-28,164.26-13,343.08

Finding the Fourth Proportional to 20,427.88, 28,164.26 and 13,343.08

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Solution

The fourth proportional to 20,427.88, 28,164.26 and 13,343.08 is: 18,396.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.88 : 28,164.26 = 13,343.08 : x
  2. Step 2: Convert to fraction form
    20,427.88/28,164.26 = 13,343.08/x
  3. Step 3: Cross multiply
    20,427.88x = 28,164.26 × 13,343.08
  4. Step 4: Simplify right side
    20,427.88x = 375,797,974.32
  5. Step 5: Solve for x
    x = 375,797,974.32/20,427.88
  6. Step 6: Final answer
    x = 18,396.33

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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.