Home / 18,686.56-28,021.68-9,919.36

Finding the Fourth Proportional to 18,686.56, 28,021.68 and 9,919.36

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Solution

The fourth proportional to 18,686.56, 28,021.68 and 9,919.36 is: 14,874.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.56 : 28,021.68 = 9,919.36 : x
  2. Step 2: Convert to fraction form
    18,686.56/28,021.68 = 9,919.36/x
  3. Step 3: Cross multiply
    18,686.56x = 28,021.68 × 9,919.36
  4. Step 4: Simplify right side
    18,686.56x = 277,957,131.72
  5. Step 5: Solve for x
    x = 277,957,131.72/18,686.56
  6. Step 6: Final answer
    x = 14,874.71

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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.