Home / 20,729.32-28,611.09-13,174.18

Finding the Fourth Proportional to 20,729.32, 28,611.09 and 13,174.18

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Solution

The fourth proportional to 20,729.32, 28,611.09 and 13,174.18 is: 18,183.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.32 : 28,611.09 = 13,174.18 : x
  2. Step 2: Convert to fraction form
    20,729.32/28,611.09 = 13,174.18/x
  3. Step 3: Cross multiply
    20,729.32x = 28,611.09 × 13,174.18
  4. Step 4: Simplify right side
    20,729.32x = 376,927,578.13
  5. Step 5: Solve for x
    x = 376,927,578.13/20,729.32
  6. Step 6: Final answer
    x = 18,183.31

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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.