Home / 20,728.15-28,615.36-12,232.85

Finding the Fourth Proportional to 20,728.15, 28,615.36 and 12,232.85

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Solution

The fourth proportional to 20,728.15, 28,615.36 and 12,232.85 is: 16,887.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.15 : 28,615.36 = 12,232.85 : x
  2. Step 2: Convert to fraction form
    20,728.15/28,615.36 = 12,232.85/x
  3. Step 3: Cross multiply
    20,728.15x = 28,615.36 × 12,232.85
  4. Step 4: Simplify right side
    20,728.15x = 350,047,310.53
  5. Step 5: Solve for x
    x = 350,047,310.53/20,728.15
  6. Step 6: Final answer
    x = 16,887.54

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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.