Home / 20,690.19-28,553.11-11,738.07

Finding the Fourth Proportional to 20,690.19, 28,553.11 and 11,738.07

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Solution

The fourth proportional to 20,690.19, 28,553.11 and 11,738.07 is: 16,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.19 : 28,553.11 = 11,738.07 : x
  2. Step 2: Convert to fraction form
    20,690.19/28,553.11 = 11,738.07/x
  3. Step 3: Cross multiply
    20,690.19x = 28,553.11 × 11,738.07
  4. Step 4: Simplify right side
    20,690.19x = 335,158,374.55
  5. Step 5: Solve for x
    x = 335,158,374.55/20,690.19
  6. Step 6: Final answer
    x = 16,198.90

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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.