Home / 20,790.66-28,690.47-11,839.44

Finding the Fourth Proportional to 20,790.66, 28,690.47 and 11,839.44

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Solution

The fourth proportional to 20,790.66, 28,690.47 and 11,839.44 is: 16,338.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.66 : 28,690.47 = 11,839.44 : x
  2. Step 2: Convert to fraction form
    20,790.66/28,690.47 = 11,839.44/x
  3. Step 3: Cross multiply
    20,790.66x = 28,690.47 × 11,839.44
  4. Step 4: Simplify right side
    20,790.66x = 339,679,098.14
  5. Step 5: Solve for x
    x = 339,679,098.14/20,790.66
  6. Step 6: Final answer
    x = 16,338.06

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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.