Home / 20,409.22-28,175.45-13,729.98

Finding the Fourth Proportional to 20,409.22, 28,175.45 and 13,729.98

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Solution

The fourth proportional to 20,409.22, 28,175.45 and 13,729.98 is: 18,954.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.22 : 28,175.45 = 13,729.98 : x
  2. Step 2: Convert to fraction form
    20,409.22/28,175.45 = 13,729.98/x
  3. Step 3: Cross multiply
    20,409.22x = 28,175.45 × 13,729.98
  4. Step 4: Simplify right side
    20,409.22x = 386,848,364.99
  5. Step 5: Solve for x
    x = 386,848,364.99/20,409.22
  6. Step 6: Final answer
    x = 18,954.59

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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.