Home / 20,790.82-28,690.50-11,359.72

Finding the Fourth Proportional to 20,790.82, 28,690.50 and 11,359.72

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Solution

The fourth proportional to 20,790.82, 28,690.50 and 11,359.72 is: 15,675.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.82 : 28,690.50 = 11,359.72 : x
  2. Step 2: Convert to fraction form
    20,790.82/28,690.50 = 11,359.72/x
  3. Step 3: Cross multiply
    20,790.82x = 28,690.50 × 11,359.72
  4. Step 4: Simplify right side
    20,790.82x = 325,916,046.66
  5. Step 5: Solve for x
    x = 325,916,046.66/20,790.82
  6. Step 6: Final answer
    x = 15,675.96

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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.