Home / 20,992.35-28,968.57-12,039.33

Finding the Fourth Proportional to 20,992.35, 28,968.57 and 12,039.33

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Solution

The fourth proportional to 20,992.35, 28,968.57 and 12,039.33 is: 16,613.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.35 : 28,968.57 = 12,039.33 : x
  2. Step 2: Convert to fraction form
    20,992.35/28,968.57 = 12,039.33/x
  3. Step 3: Cross multiply
    20,992.35x = 28,968.57 × 12,039.33
  4. Step 4: Simplify right side
    20,992.35x = 348,762,173.86
  5. Step 5: Solve for x
    x = 348,762,173.86/20,992.35
  6. Step 6: Final answer
    x = 16,613.77

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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.