Home / 20,399.13-28,153.02-12,441.29

Finding the Fourth Proportional to 20,399.13, 28,153.02 and 12,441.29

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Solution

The fourth proportional to 20,399.13, 28,153.02 and 12,441.29 is: 17,170.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.13 : 28,153.02 = 12,441.29 : x
  2. Step 2: Convert to fraction form
    20,399.13/28,153.02 = 12,441.29/x
  3. Step 3: Cross multiply
    20,399.13x = 28,153.02 × 12,441.29
  4. Step 4: Simplify right side
    20,399.13x = 350,259,745.43
  5. Step 5: Solve for x
    x = 350,259,745.43/20,399.13
  6. Step 6: Final answer
    x = 17,170.33

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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.