Home / 20,860.92-31,249.70-12,536.43

Finding the Fourth Proportional to 20,860.92, 31,249.70 and 12,536.43

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Solution

The fourth proportional to 20,860.92, 31,249.70 and 12,536.43 is: 18,779.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.92 : 31,249.70 = 12,536.43 : x
  2. Step 2: Convert to fraction form
    20,860.92/31,249.70 = 12,536.43/x
  3. Step 3: Cross multiply
    20,860.92x = 31,249.70 × 12,536.43
  4. Step 4: Simplify right side
    20,860.92x = 391,759,613.89
  5. Step 5: Solve for x
    x = 391,759,613.89/20,860.92
  6. Step 6: Final answer
    x = 18,779.59

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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.