Home / 20,790.50-28,691.16-11,359.27

Finding the Fourth Proportional to 20,790.50, 28,691.16 and 11,359.27

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Solution

The fourth proportional to 20,790.50, 28,691.16 and 11,359.27 is: 15,675.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.50 : 28,691.16 = 11,359.27 : x
  2. Step 2: Convert to fraction form
    20,790.50/28,691.16 = 11,359.27/x
  3. Step 3: Cross multiply
    20,790.50x = 28,691.16 × 11,359.27
  4. Step 4: Simplify right side
    20,790.50x = 325,910,489.60
  5. Step 5: Solve for x
    x = 325,910,489.60/20,790.50
  6. Step 6: Final answer
    x = 15,675.93

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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.