Home / 20,942.39-28,900.71-11,382.27

Finding the Fourth Proportional to 20,942.39, 28,900.71 and 11,382.27

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Solution

The fourth proportional to 20,942.39, 28,900.71 and 11,382.27 is: 15,707.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.39 : 28,900.71 = 11,382.27 : x
  2. Step 2: Convert to fraction form
    20,942.39/28,900.71 = 11,382.27/x
  3. Step 3: Cross multiply
    20,942.39x = 28,900.71 × 11,382.27
  4. Step 4: Simplify right side
    20,942.39x = 328,955,684.41
  5. Step 5: Solve for x
    x = 328,955,684.41/20,942.39
  6. Step 6: Final answer
    x = 15,707.65

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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.