Home / 18,868.69-28,229.85-13,615.79

Finding the Fourth Proportional to 18,868.69, 28,229.85 and 13,615.79

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Solution

The fourth proportional to 18,868.69, 28,229.85 and 13,615.79 is: 20,370.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.69 : 28,229.85 = 13,615.79 : x
  2. Step 2: Convert to fraction form
    18,868.69/28,229.85 = 13,615.79/x
  3. Step 3: Cross multiply
    18,868.69x = 28,229.85 × 13,615.79
  4. Step 4: Simplify right side
    18,868.69x = 384,371,709.33
  5. Step 5: Solve for x
    x = 384,371,709.33/18,868.69
  6. Step 6: Final answer
    x = 20,370.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.