Home / 20,498.05-28,289.33-11,999.66

Finding the Fourth Proportional to 20,498.05, 28,289.33 and 11,999.66

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Solution

The fourth proportional to 20,498.05, 28,289.33 and 11,999.66 is: 16,560.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,498.05 : 28,289.33 = 11,999.66 : x
  2. Step 2: Convert to fraction form
    20,498.05/28,289.33 = 11,999.66/x
  3. Step 3: Cross multiply
    20,498.05x = 28,289.33 × 11,999.66
  4. Step 4: Simplify right side
    20,498.05x = 339,462,191.21
  5. Step 5: Solve for x
    x = 339,462,191.21/20,498.05
  6. Step 6: Final answer
    x = 16,560.71

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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.