Home / 20,613.38-28,447.16-12,115.38

Finding the Fourth Proportional to 20,613.38, 28,447.16 and 12,115.38

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Solution

The fourth proportional to 20,613.38, 28,447.16 and 12,115.38 is: 16,719.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.38 : 28,447.16 = 12,115.38 : x
  2. Step 2: Convert to fraction form
    20,613.38/28,447.16 = 12,115.38/x
  3. Step 3: Cross multiply
    20,613.38x = 28,447.16 × 12,115.38
  4. Step 4: Simplify right side
    20,613.38x = 344,647,950.51
  5. Step 5: Solve for x
    x = 344,647,950.51/20,613.38
  6. Step 6: Final answer
    x = 16,719.63

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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.