Home / 20,427.36-30,640.92-11,538.66

Finding the Fourth Proportional to 20,427.36, 30,640.92 and 11,538.66

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Solution

The fourth proportional to 20,427.36, 30,640.92 and 11,538.66 is: 17,307.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.36 : 30,640.92 = 11,538.66 : x
  2. Step 2: Convert to fraction form
    20,427.36/30,640.92 = 11,538.66/x
  3. Step 3: Cross multiply
    20,427.36x = 30,640.92 × 11,538.66
  4. Step 4: Simplify right side
    20,427.36x = 353,555,157.97
  5. Step 5: Solve for x
    x = 353,555,157.97/20,427.36
  6. Step 6: Final answer
    x = 17,307.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.