Home / 20,942.88-28,900.68-11,382.54

Finding the Fourth Proportional to 20,942.88, 28,900.68 and 11,382.54

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Solution

The fourth proportional to 20,942.88, 28,900.68 and 11,382.54 is: 15,707.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.88 : 28,900.68 = 11,382.54 : x
  2. Step 2: Convert to fraction form
    20,942.88/28,900.68 = 11,382.54/x
  3. Step 3: Cross multiply
    20,942.88x = 28,900.68 × 11,382.54
  4. Step 4: Simplify right side
    20,942.88x = 328,963,146.13
  5. Step 5: Solve for x
    x = 328,963,146.13/20,942.88
  6. Step 6: Final answer
    x = 15,707.64

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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.