Home / 20,382.56-28,128.23-11,884.45

Finding the Fourth Proportional to 20,382.56, 28,128.23 and 11,884.45

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Solution

The fourth proportional to 20,382.56, 28,128.23 and 11,884.45 is: 16,400.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.56 : 28,128.23 = 11,884.45 : x
  2. Step 2: Convert to fraction form
    20,382.56/28,128.23 = 11,884.45/x
  3. Step 3: Cross multiply
    20,382.56x = 28,128.23 × 11,884.45
  4. Step 4: Simplify right side
    20,382.56x = 334,288,543.02
  5. Step 5: Solve for x
    x = 334,288,543.02/20,382.56
  6. Step 6: Final answer
    x = 16,400.71

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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.