Home / 20,909.77-28,857.53-11,958.59

Finding the Fourth Proportional to 20,909.77, 28,857.53 and 11,958.59

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Solution

The fourth proportional to 20,909.77, 28,857.53 and 11,958.59 is: 16,504.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.77 : 28,857.53 = 11,958.59 : x
  2. Step 2: Convert to fraction form
    20,909.77/28,857.53 = 11,958.59/x
  3. Step 3: Cross multiply
    20,909.77x = 28,857.53 × 11,958.59
  4. Step 4: Simplify right side
    20,909.77x = 345,095,369.68
  5. Step 5: Solve for x
    x = 345,095,369.68/20,909.77
  6. Step 6: Final answer
    x = 16,504.03

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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.