Home / 20,729.09-28,610.76-13,173.95

Finding the Fourth Proportional to 20,729.09, 28,610.76 and 13,173.95

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Solution

The fourth proportional to 20,729.09, 28,610.76 and 13,173.95 is: 18,182.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.09 : 28,610.76 = 13,173.95 : x
  2. Step 2: Convert to fraction form
    20,729.09/28,610.76 = 13,173.95/x
  3. Step 3: Cross multiply
    20,729.09x = 28,610.76 × 13,173.95
  4. Step 4: Simplify right side
    20,729.09x = 376,916,578.65
  5. Step 5: Solve for x
    x = 376,916,578.65/20,729.09
  6. Step 6: Final answer
    x = 18,182.98

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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.