Home / 18,930.94-26,100.42-15,515.38

Finding the Fourth Proportional to 18,930.94, 26,100.42 and 15,515.38

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Solution

The fourth proportional to 18,930.94, 26,100.42 and 15,515.38 is: 21,391.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.94 : 26,100.42 = 15,515.38 : x
  2. Step 2: Convert to fraction form
    18,930.94/26,100.42 = 15,515.38/x
  3. Step 3: Cross multiply
    18,930.94x = 26,100.42 × 15,515.38
  4. Step 4: Simplify right side
    18,930.94x = 404,957,934.46
  5. Step 5: Solve for x
    x = 404,957,934.46/18,930.94
  6. Step 6: Final answer
    x = 21,391.33

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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.