Home / 20,942.96-28,901.20-11,382.80

Finding the Fourth Proportional to 20,942.96, 28,901.20 and 11,382.80

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Solution

The fourth proportional to 20,942.96, 28,901.20 and 11,382.80 is: 15,708.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.96 : 28,901.20 = 11,382.80 : x
  2. Step 2: Convert to fraction form
    20,942.96/28,901.20 = 11,382.80/x
  3. Step 3: Cross multiply
    20,942.96x = 28,901.20 × 11,382.80
  4. Step 4: Simplify right side
    20,942.96x = 328,976,579.36
  5. Step 5: Solve for x
    x = 328,976,579.36/20,942.96
  6. Step 6: Final answer
    x = 15,708.22

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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.